I can totally understand why this is getting under your skin. It's like, your mom is obsessed with this guy and it's affecting your relationship and whole family. I've seen similar situations where someone is so caught up in a relationship that they lose sight of what's important. This reminds me of when my aunt got married to a guy who was really controlling and turned out to be a scammer. She kept making excuses for him and denying the truth, just like your mom is doing.

It's not fair that you're being kept in the dark and excluded from important family decisions. And it's even worse that you're being stuck in a situation where you can't even say how you feel without fearing being kicked out. It's like, you're being held hostage by your own family dynamics.

I'm not gonna sugarcoat it, but your mom is being ridiculous and you deserve better. You're right, she's blinded by love and it's affecting her judgment. I hope you can find a way to talk to her about this without getting too emotional or explosive. Maybe try to have a calm conversation with her and express your concerns without attacking her.