I'm going to ruin my twins relationship with my mom
Wow! What did they do to make you want to do this?
I found her son was rude to our mom.
Well you shouldn't ruin others' relationships. Also, what does her son have to do with this?
I'm not going to answer that.
You look like the bad guy from my perspective. I think you should stay out of this and not kick up family drama. If you mom is not complaining you should move on.