"Maybe it's too late to change her mind" BRUH... she rejected you YEARS ago when she was in a situation to be EASILY peer pressured into saying yes... and now you want her to say yes when she's already fucking married??? Even if she wasn't in love with Del like... why do you think she'd want to marry you???
Dude doesn't realize he's a brother to her, and he's the weird one for having feelings for a female relative 😒