u/Background-Forever81

(M 23)For context my sister and I are twins. We used to have sex and mess around when we were younger but stopped because of morals and not wanting to get pregnant. We made a promise at the time that we would have sex again before either of us got married. She just got engaged we are home alone together and she just got in the shower. We haven’t had sex in 7 or 8 years Should I bring it up? If so how?

UPDATE: she responded saying she has done everything in her power to forget about all that. Also she says she doesn’t remember the promise. No bueno