Bigger tits, obviously

"It seems to me that the core issues here are trust and power." They both appear to be listening closely, so you continue on. "As much as you love one another, and seem in sync in private, in public there are several power imbalances that are plain for others to see. Emma, you come from a wealthy family, and Eric does not. You have steady employment and support him, and you also have what many would consider a more prestigious career. Your family thinks Eric is a gold-digger; if they're saying it out loud, then you have to know that others in your social circle are saying it behind your back."

They both nod grimly, and you barrel on ahead. "That kind of constant judgement is hard to endure, and over time it's likely to cause problems. I'd actually say it already is... Emma, did you notice that you've barely let Eric get a word in edgewise during this whole session?"

She looks over at him, surprised; he just shrugs and smiles fondly. "I don't mind, Doc. Emma's always got a lot going on in her head."

"Maybe, but it could also be that on some level, she does think herself above you... That her opinion matters more than yours. She certainly holds the power in your relationship, so that's quite understandable." You pause for a moment to let them think, then go straight for the prize: "Now this is going to seem a bit out of left field, Emma, but what do you think of D-Cup+ women?"

As expected, that confuses her. "I'm... I'm not sure what you mean. I'm not bi."

"No, no, that's not what I mean at all," you wave your hand dismissively. "Let's try another tack. Did Eric make use of any of the attendants in the waiting room?"

"Oh... I see," she replies, relaxing visibly. "Yes, he pulled one over for a tit-fuck while we were waiting. Why do you ask?"

"We'll get to that in a moment. Now, do you both enjoy your sex life?" They both nod. "Would you say that Eric exerts control in the bedroom?"

She thinks about it. "...Well, I mean, I do like it rough sometimes, but he always asks first. He's very attentive, and I try to do the same."

"Alright. Eric, same question."

"Yeah, I think that's right."

"Would you ever ask her for a tit-fuck in the waiting room?"

"What? No," he laughs. "We'd be arrested for indecent exposure."

"Exactly. So, Emma, back to my original point, and I'll give you some more context. You're a pretty busty woman, and you're on the slim and short side, so your breasts look bigger than normal on your frame. Does anyone ever proposition you as if you were a D-Cup?"

"Oh... I see. Sure, the occasional student, and one time another teacher made that mistake. But they backed right off, of course."

"Were you offended?"

"I mean, I guess a little. If they did the same thing knowing that I wasn't free use, it would be sexual harassment. They aren't allowed to treat me like that."

"Right. You have the power in that situation, and they don't. I'll bet you have a few D-Cup+ colleagues whose careers aren't as far along, because they constantly have to go suck off a student. D-Cups and above don't have the same power that you do."

"Right, but what does this have to do..." She trails off, confused again.

"I'm coming around to the point, I promise." You give her a comforting smile. "We need a way to balance out the power dynamic in this relationship. Now, most people think of being D-Cup+ as a binary decision. If a young woman thinks she's getting too top-heavy, she can choose to get a reduction before she's a legal adult. If someone gets enhanced later in life, then they've made their own choice. But it isn't that simple anymore."

You reach into your desk, and pull out a pill bottle labeled "Upgra-D Temps."

"Now, I know I work at a Pearson's clinic, but I promise this isn't a sales pitch," you chuckle. "These pills will grow your breasts out into full-blown fun-bags, but only for a few hours. You're not exactly flat as it is, so about half a pill should be enough to get you over the D-Cup+ limit for a few hours. You can take up to three a day, but be aware that the more you take, the bigger they'll get... And the longer it will take to leave your system."

Emma and Eric both look shocked, but neither interrupt.

"The idea here is to let Eric experience a situation where he's fully in control. Emma, I would like you to take one of these whenever you two are going to be alone for at least a few hours this week. Note that I didn't say 'when you're about to fuck;' that won't be your decision. You won't be role-playing, you won't be there for your own pleasure, and you won't be able to say no."

Emma reaches out and picks up the bottle. "...And then what?"

"Well, we'll have another session next week and talk about the results. I'd like to see if it helps with Eric's assertiveness, and if it has any effect on your relationship outside of sex. Eric, I promise you that as fun as my waiting room girls are, it doesn't compare to fucking a D-Cup+ girl that you love." You glance fondly over at a picture on your desk, where your two Aprils are locked in a sixty-nine.

Emma stares at the bottle, then looks up at you. "You said power and trust. What's the trust part?

"Yes! Sorry, almost forgot. So, if you went and tit-fucked Eric in the waiting room without the pills, you'd be arrested for indecent exposure, right?"

"Yeah..."

"So you wouldn't do it?"

"No."

"But say we had you pop a pill right now, and then you walked out of the office, free to use. Then Eric turns to you, pushes you down on your knees, and says 'get to work, Bitch.' What would you do?"

She blushes and glances at her fiance. "I... I guess I would."

"Right, because you'd be a D-cup slut, and you'd be his for the taking. How about another hypothetical: you two get home tonight, you pop a pill, and you fuck like crazy. Then, when it starts to wear off, Eric shoves two pills in your mouth and orders you to swallow. Do you do it?"

"...I would." She's staring at Eric now, wide-eyed. "I'd have to."

"Yes. And the next morning, while he's playing with your giant jugs, Eric says nothing would please him more than taking you down to Pearson's and spending a chunk of your trust fund on every enhancement we have... He'd make you his fucktoy permanently. Would you do it?"

"I..." Words fail her, but after a few seconds she gives you a single nod.

"Every time you take one of these pills, you're not just giving Eric the power to fuck you however he wants for a few hours. You're trusting him with your future. You're trusting that he wants Emma his fiance more than Emma the mindless bimbo doll. Do you trust him?"

She stares at Eric for what feels like an hour before responding. "Yes. I trust him."

"Good!" You laugh and slap your hand on your desk, standing up quickly. That seems to cut the tension, and everyone is all smiles as you show them to the door.

You don't really want this experiment ruined by chance though, so you decide to pass a bit of your power on through Emma:

"Oh, before I forget. In case you mess up the dosage and have to leave the house with your tits all ballooned up, we don't want you to end up the **** of one of your students or anything like that. If you're both okay with with Emma leaving the house while free-to-use, that's fine... But if anyone aside from Eric tries to make any permanent changes, just tell them 'Doctor John Doe says I can't until my treatment is done.' People usually accept a Doctor's word, y'know?"

After a brief goodbye the couple leaves hand-in-hand, and you head back to your desk. Sighing with satisfaction, you open your schedule and take another look at today's appointments. The Pipers are concerned about their teenaged son... The maid-loving Mr. Piaget needs help dealing with his angry wife... Mr. Bautista is here for another lesson on domination and ****... And finally, you're eager to see how Tyler and his harem are doing.

That said, your mind is still lingering on Emma and Eric... What will their relationship be like, when they come back in for a follow-up?