Change their memories

You take a deep breath, then begin. "Remember when I walked in on you and Peter this morning? You were plowin' throat like your life depended on it, but I didn't know who you were violating until I asked. Couldn't tell whether it was Mom or Dad."

Michael nods and raises an eyebrow. "Yeah, that happens to me too. But why..?"

"Well, call me crazy, but that shit makes me hard. I LOVE how similar our sluts are... Husband and wife, reduced to bimbo twins." You glance down at April, and she gives you a kind smile; it's the exact same look she uses when somebody compliments her cooking.

"Yeah, me too. That's why we keep their mods and hormones and shit synced," Mike says, reaching down to grope one of his mother's newly-expanded breasts.

"Right, but the guessing game is over the moment one of them opens their mouth. They look the same, but they don't think the same, act the same..."

"Just what are you getting at, John?"

You run a hand through your hair, a little embarrassed despite yourself; you've had control over Mike's family for a month now, but what you're about to propose is new. "I was doing a little bit of research on sex mods the other day... Just looking for a better deal on growth formula..."

"Sure, sure." Mike flicks April's fat nipple absent-mindedly, ignoring the resulting yelp.

"I sorta went on this deep-dive, and I got to reading about mental mods. Memory stuff, specifically. You know how advanced that stuff's getting?"

"No, but I'm sure you're gonna tell me."

"Long story short, our local Pearson's Perfections clinic just started doing memory removal and replacement."

That finally gets your friend interested. "...Wait, really? Like, you can make people remember shit that didn't happen?"

"Pretty much. Only D-cup-plus women, of course, and you need consent... But I don't think that's gonna be a problem here. Your folks will do _anything _to get my rocks off... Right, April?"

The bimbo at your feet nods without hesitation. "Of course, John. That's what we're for!"

"So..." Mike furrows his brow, managing to look thoughtful even as his mom jacks him off and he continues playing with her tit. "...You want April and Peter to be REALLY the same. Like, to have the same memories."

"More or less, yeah. Ideally, I'd like them to remember the way things used to be... That they're your parents, and that one of them used to be April while the other used to be Peter... But no specifics to clue them into who's who."

"And they can _do _that? That's fuckin' nuts... But..." His bewildered expression turns into a grin. "It's fuckin' hot, too."

"What do you think, April?" You look down to the woman jacking you off. "Any strong opinions?"

"I _think _that I can feel my son's cock getting even harder... And yours too," she says, grinning as she picks up the pace. "If this makes my special boys horny, then it HAS to be a good idea!"

"Th-thanks Mom... Oh, fuuuck," Mike groans, before thrusting his hips up off the couch and shooting a jet of cum into the air. It splatters across April's still-pumping arm, and the ones that follow land on her cleavage (it's a pretty big target, after all).

She continues smiling as her son coats her chest with jizz, gradually slowing down her hand as he slumps into the couch.

"Mmm, damn... This IS a good idea," Mike sighs. "When d'you think we can start?"

"I already called the clinic," you reply cheerfully. "We're taking them in next week."

"John's the MVP again, huh?" Your friend chuckles, leaning back further and closing his eyes. "This is why we're bros. Wake me up in a week..."

You laugh with him, then stop as you realize he's not acting; he's actually gone to sleep. "Well, damn." Rising to your feet, you extend a hand to help April up too. "C'mon, let's go to the bedroom. Mike needs his rest, and I want to do some stuff to you that's gonna get loud."

"Oh? Planning on mounting Mommy's big, jiggly butt?" She jumps playfully, showing off her rear end.

"For starters," you reply, grabbing a handful and leading her upstairs.