In love with my fiancé's sister

You're dating Sarah's sister, Rachel, and Sarah haves feelings for you and you have feelings for Sarah but you can't tell Rachel since you and Rachel are getting married very very soon and you don't want to break Rachel's heart but you can't deny your feelings for Sarah..

TW- smut, cursing, mommy kink, cg/l and more

Info: Y/N= Your name, Y/N/N= Your Nick Name, Y/L/N= Your Last Name

DISCLAIMER- Sarah is not trans and I'm not trying to name her something she's not, this is just a fanfic

A/N: I WONT POST THAT MUCH BECAUSE OF SCHOOL