The whole family

As you walk down the side of the house, you hear jazz music drifting through an upstairs window. Your father, Greg, must be working from home; he always uses jazz to drown out household distractions.

Rounding the corner and stepping onto the deck of your backyard pool, you hear a female voice call out from beside you. "Hey, John!" You turn to see your sister Julie lying on a deck chair, tanning in a white and purple bikini. She looks much the same as the last time you saw her—dark, shoulder-length hair, skinny build, brown eyes, giant breasts...

No, wait. That last one's new. Your sister's never been anywhere close to a D-cup, but now she looks to be just over the threshold. Somehow, she's crossed the line into free-use territory, and your feelings about it are mixed; on the one hand, you've got a live-in sex ****, and an incredibly hot one at that. On the other hand...well, given how amazing the first hand is, you've forgotten the other one already.

"My eyes are up here, moron," she says with a laugh.

Tearing your gaze away from her new breasts, you smile at her. "Hi, Julie. How's it going?"

She shrugs. "Same old. Trying to work on my tan...I know how much you like it."

You decide it's time to do some probing about the status quo. Maybe you should start with her boyfriend. "Yeah, I sure do. But what does Tim think about it?"

"Who?" she replies, raising an eyebrow. "You know you don't let me show off for other guys. Are you screwing with me?"

"Uh, yeah," you say. "Just testing you. Here's another one: why did you get fake tits?"

Her hands move to her chest, pulling her bikini aside to reveal her erect nipples. She rubs them gently, looking at you naughtily. "Oh, these? Well, I was getting a bit jealous of Mom, and when you told me that you'd keep me all to yourself, I figured...what's the harm? Since other guys can't **** me, all that's changed is that I get to fuck my handsome brother every day," she summarizes with a sexy wink.

"Jealous of Mom? But she's not quite a D-cup, so...wait, did she get surgery too?" You sit on the lounger beside her, your confusion and curiosity barely fighting back your desire to pounce on your sister.

Julie chuckles, shaking her head. "No, moron. She didn't get—" she manages before being interrupted by the sound of the patio door opening. Turning around, you no longer need your sister's explanation.

Your mother Christine stands in the doorway, wearing a bikini that matches Julie's. It's not the only thing that matches; they've always looked similar, especially since your mom was so young when she had you and your sister. But there's one major difference: while Julie's looking a bit different with her new breasts, Christine appears even more changed, with a clearly pregnant belly and a newly-grown rack of her own, though hers appears to be natural.

"Hey, kids," she says cheerfully, before walking over to sit beside you, resting a hand on the crotch of your pants. "Does my big man need some help?"