You abuse the contract

Byleth: alright so now what, are you going to introduce me to your party, I'm sure they would love to see me again

Aiden: I really doubt that, since Stark is still in a coma

Aiden: and I can't have you officially joining the party until you're completely obedient to me

Byleth: you do realize, that the contract only makes me follow your orders, it doesn't make me obedient to you

Aiden: oh believe me I do

Aiden: Fubuki

Fubuki: what is it Aiden

Aiden: can you make sure nobody interrupts us

Fubuki: I would have loved to watch, but I understand you don't want any interruptions

Fubuki: I'll make sure nobody bothers you

Aiden: thank you

Byleth: what the hell are you two talking about

Aiden: Byleth, I command you to show me your tits

Byleth: WHAT!

Byleth's body starts to move on its own, thanks to the contract she signed

Byleth: NO STOP, DON'T SHOW HIM

Byleth takes her tits out

Aiden: look at those nice tits you got

You slap her tits

Byleth: REALLY THIS IS WHAT YOU USE THE CONTRACT FOR, IS THIS SOME FANTASY OF YOU OR SOMETHING

Byleth: THIS IS ACTUALLY QUITE PATHETIC, FORCING ME TO DO THIS, ARE YOU THAT STARVED FOR PUSSY, HELL I BET YOU HAVE A LITTLE DICK

You refuse to answer, instead you pull your dick out for her to see

Byleth: w-what

Aiden: what's wrong Byleth what happened, you talked such a big game

Byleth: WHAT THE HELL IS THAT, IT'S SO BIG

Aiden: I get that a lot

Byleth: GET AWAY FROM ME, I AINT TOUCHING THAT

Aiden: oh you'll be doing more than just that

Byleth: LIKE HELL I WILL

Aiden: I command you to get on your knees

Byleth gets on her knees

Byleth: GODDAMN IT BODY DON'T LISTEN TO HIM

Aiden: your body has no choice but to listen to me, and soon you will too

Byleth: IN YOUR DREAMS

you put your cock right in front of her mouth

Aiden: I command you to open your mouth and suck my cock

and just like before Byleth's body follows your commands and forces her to start sucking your cock