Figuring out how to get back at Michelle turns into something else

The next evening Molly called you when you were already in bed.

"Hey" she said.

"Hi there" you replied, putting your laptop aside. You'd been watching a movie when she called, but talking to her obviously took precedence.

"What's up" Molly asked.

"Was just watching some Ryan Reynolds movie when you called. What about you?" you answered.

"Still angry at my sister for seeing my boyfriend naked" she told you.

"I'm your boyfriend now, huh?" you asked.

"Of course. We've been on a date and everything. It sounds better than 'guy whose dick I sucked while I was meant to be caring for him', doesn't it? she said.

"In your defense, one might call blowing me an act of kindness, even if it doesn't fall under the Hipocratic Oath" you replied.

"Well, sure, but even then, being your nurse does not involve you seeing me naked" she pointed out.

"I've seen Diana naked too, so maybe" you said.

"What?! When?!" your former nurse exclaimed.

"Calm down, I was teasing" you said. "The only nurse I've ever seen naked is you. Oh, and Mia Malkova. I don't think that counts, though."

"Porn, huh?" Molly said. "You won't need porn anymore" she said.

"No? How come?" you asked, guessing at the answer.

"Starting from the next time we see each other, I'm going to be your own pornstar" Molly purred.

"Yeah?" you asked, sensing an opportunity to turn this into more than a friendly chat.

"For sure, baby" Molly said. You knew she was smiling, you could hear it in her voice. "First I'm going to go to my knees and tease you a little. I'll kiss that sexy bulge of yours for a couple of minutes. I'll make sure to look up at you every once in a while, too. That way I can see how much you're liking what I'm doing."

You couldn't help but start to jerk off as you listened to Molly. Before long you had a video chat going on and your cock was featured prominently on your end of the screen.

"Then what?" you asked.

"Then I'm finally going to do what I've wanted to do but have been ashamed to admit, even to myself" she said.

"What's that?" you asked as you stroked yourself. Molly watched for a while with rapt attention, licking her lips as she did so.

"I'm going to get you to finally fuck me, honey" Molly told you. "I've wanted you to do that ever since I saw that big fat cock you're now waving in my face." She shivered visibly. "If I could, I'd rock your fucking world right now."

"What about Michelle?" you asked.

"I should tie her up so she can watch us fuck" Molly said with an evil grin.

"You are twisted" you said.

"Do no harm doesn't apply to sneaky little sisters who tricked your boyfriend into sending her pictures of his big fat cock" Molly said. "So she gets to see that" she said, tapping her screen, "go into this" she added while bringing the camera between her legs, showing you her gorgeous, perfect pussy.

"I don't think I'm going to be able to fit in there" you teased.

"We're going to damn well try" Molly replied as she slid a finger inside.