Nonesuch remember my prank sera wish list I had under ideas about 1-2 years ago? Some of that might be considered.
But currently I would love the options to make her act like a bimbo and dress cutey girlys even though she isn't as a Dom move on her.
Ie get her to go platinum blond. Bigger more sensitive tits, brazilian ass, higher libido and fertility, maybe sweet milkies...
Also have her see (if you have more than one pussy or dick) that two might be better. Anal done right is fun...but two pussies - she might have to beg for it or surprise you and expect you to order her to change back, but you decide to keep her w/two pussies instead.
Jealous Sara scene where you have her service all of your crew as punishment for her barging in on you and someone else in bed. Cause she was horny frustrated and thinks you don't love her anymore. Tell her you're not gonna turn on her birth control either...make her sweat her duties...
Find frilly girly dresses hats and bows and make her wear them (w/o underwear of course) and take her on promenade. (she even gets a girly umbrella). Could be a geisha version of this too.
Catch her riding your egg trainer...which she's stuffed your goo armor or convinced Celise to enter the egg/lube resevoir...she keeps impregnating herself over and over and over. Discussion leads you to find out that she's now got a fetish with getting pregnant and having babies/giving birth, but not so much the being pregnant part itself...too long and can't get preggers during.
She's roleplaying mommy with Celise and your good when she gives egg birth less than twenty minutes later. She's taken a temp lactation mod to allow for this.
To punish her you reach in and set the pregnancy to infinite (ie the one where you stay perma preggers until machine removes the eggs from you?)
This leads to her breaking down and telling you of her fetish in a confession and begging you to get her the ability to lay her own Real eggs for her children instead of carrying them for X number of months/days.
This could lead to Sara being given a TF (Custom as she requests/demands- likely with sexual favors and promises of being a good girl)
pussy/ovipositor basically laying eggs vs gestating live births) So short impregnation and lays a BIG BIG egg or two later. Which can go to the Nursery. And she is free to get pregnant again. Her original pussy though she reserves for you and you alone to get pregnant.
Her secret plan is to have a shit ton of demon children that are ensured a good start and education. A lil prank on the universe releasing all those succubi upon the universe.