"ohhh they look so similar, they're both in love with their childhood best friend and have a secret identity that they hide from her"

fellas I think the key factor that connects Kaito and Shinichi is their absolutely batshit insane, very hot mums 😌

been happy to see their son happy? I'm scared I will dislike my inlaws forever and they will dislike me. Sometimes when our families come together I am embarrassed of how my mother in law behaves. Sometimes I get scared of her too. I really want to talk about it more with my fiancé but I don't know how. I feel like he won't hear me. Sometimes I think he's just like them and I hate him so much. But what kills me is he thinks they're gods, and I feel like he puts their needs before mine

He's going to be marrying YOU and YOUR'E the one he's going to be spending the rest of his life with. Maybe he just needs someone to wake him up and make him realise that. Because it seems like he's intending on continuing to prioritise his family over you. From what you've said, he seems like one with a short temper. So maybe consider sitting him down when he's in a good mood and just explain it to him in loving way. Without making it look like you're trying to bash his family because hes clearly very protective over them.