32 years of age gap - does this affect the relationship?

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i was adopted by a good family and i was loved soo much by a person who became my sister.. she's 8 yrs older than me.. we're very close since she doesn't have any sisters.. she Looks after me very well - clothes, food, hygiene, manners, etc.. she became more like a mama to me.. then after a few years, my real family took me to UK.. my communication to my sister didn't stop.. i always message her and call her.. then early this year, i went to visit her in her country.. during my stay, she had a failed relationship.. then she met a guy online who is 32 yrs older than her (she's 32, and he's 63) which i had a chance to meet before i left.. then in just 2 weeks time, they met.. then after 3 weeks, they were engaged.. i was just soo worried how fast their relationship is.. next year, they are getting married.

to tell you guys the truth, my sister is a transexual but people can't really tell that she used to be a man. is just that i love her so much but im worried about my sister's future. im really really close with her. she consulted me about this but i just kinda agreed with it and showed that im happy and ill support her in every way. my soon-to-be-brother-in-law is actually a very jealous guy. considering the beauty of my sister, he is very jealous and always ask things - making petty things to become major issues. that's why they always fight. but since my sister is very understanding, she tried to patch things up with him the next day. does this kind of relationship works?

**the guy knows she's a tranny