Two of my obsessions: Mini-Morty and a/b/o dynamics. Why not put them together? So a teeny tiny little omega Morty gets adopted by a normal sized (and therefore relatively enormous) Alpha Rick. Mini Omega Morty's first heat he keeps begging Rick to fuck him and Rick just watches this tiny little Morty desperately masturbating and rutting against his thumb and writhing in his palm and begging him to fuck him and Rick just laughs at how cute and helpless he is. Eventually he asks, rather cruelly, "And how d-do you think I'm gonna do tha(euughh)aaat, Morty? My dick's about the-th-the size of your whole body. I'd r-r-rip you into pieces." And slutty, tiny little Morty just can't stop begging. "P-please! I don't care Rick! Rip m-me up! Just, just p-put something in-inside me! P-p-please Rick!" And middle middle middle, Rick dips his finger into his cum and fucks Morty with his pinky until he's pregnant. Imagine the tiny small itty bitty Morty walking around on counters and not being able to climb on stuff anymore with his big round belly and leaky little boobies. And Rick would be soooooo overprotective. He's tiny, and he's pregnant with his child. And then Rick would be able to shrink down clothes, so he'd be the source of Mortys clothing, so he'd be able to dress Morty up in whatever he wanted. He'd make him the cutest little pregnant schoolgirl or whatever a person (old pervert grandfather) can imagine.