Very sex-nificantly.

Suki is dressed in erotic red lingerie: stockings, garterbelt, crotchless panties, and a bra with heart-shaped holes. Her mother is nude save for a familiar tank top that leaves the tops of her areolas exposed.

"You like? I'm told this is the top she was wearing when you resolved to deflower her. She meanwhile, is wearing what I was when she was conceived. Maybe she'll conceive her own buxom daughter in it if you're not careful."

"Mom, jeez." She exclaims, squirming in anticipation.

"Of course, if that happened, I expect you to do the responsible thing."

"I think we should move on to the action, don't you?"

"Alright, I suppose you can't really contain yourself in this situation."

Suki rushes over to you and begins making out with you.

"And neither can she. Delightful youth. Make room for mommy now."

She gets on her knees and unleashes your cock, stroking the shaft while sucking the rest. You moan into Suki's mouth.

"Grope me. Lick me. Give me as much pleasure as she's giving you."

You do both to either breast while her mother intensifies what she's doing down there.

"Careful, you don't want me to cum too early, do you?"

"I do enjoy the taste, but I suppose we need to prolong this as much as possible."

Suki takes you by the cock and brings you to the bed. She lays back and guides you inside her pussy. Her mother hugs you from behind and presses her breasts against your back.

"Fuck me Dick! Fuck me with your wonderful dick! Fill me up all you want."

"Such language. Do you kiss me with that mouth? I bet he'd like to see that."

"Oh yeah, definitely."

You thrust in her as her mother makes out with her. She then gets on top of her and wiggles her hips.

"Fuck me too. Fill us up all you want."

You pull out of Suki and enter her, and she loses it.

"Mmm, this is so naughty. I'm being fucked on top of my daughter by her boyfriend with her juices lubing it up. Keiko is such a shameless milf slut. Show more of my slutty self to her."

You fuck her rough and pull down her top. Their nipples occasionally rub against each other through Keiko's efforts. You can't hold it in anymore, so you switch back to Suki in time to give her a creampie.

"Ohh, thank you my love."

"Careful, we can't get cum on these sheets. This is my room after all."

She desperately eats out her daughter to drink your cum, with a somewhat plausible excuse for the act. It gets you hard again seeing this taboo scene. You turn Suki's head to the side and she sucks you off, tasting the various juices of the threeway.

"This is so hot. I want to see you return the favor when I cum in her next."

She nods, continuing the blowjob.

"I'll take that as a promise. Go ahead. Give me another creampie, this time so she can see it."

"Mom! You keep letting him cum inside? What if you get pregnant?"

"It might be too late. You know how fertile I am."

"Oh my god, it's so obvious now. You weren't volunteering as a surrogate, you were just getting knocked up by other guys. Now you want to carry his?"

"I suppose you want to bear his firstborn? If you're going to let him sleep around, you risk others will take his firsts."

She takes in that realization and finds new resolve.

"What haven't you done with anyone else yet?"

"Off the top of my head, anal."

She's taken aback, but with visible apprehension, she bends over and spreads her cheeks.

"The-the-then, do it. Claim my second virginity."

"Oh, I really want your next load, but I'm intrigued. Are you really going to pop her black cherry? Oh don't worry, it's just an expression."