With every breath a woman has, there is a possibility she would cheat. My ex invited me to go have dinner with one of her Chinese male friends. I didn't want to but told her she could go, and she did.
This is called being secure.
The fact that I just let her go do what she wanted showed I wasn't afraid to lose her, which she perceived as me caring less. and I wasn't, I knew she was all about me.
She was back with in 40 mins, and brought me half of her food.
She also would hang out with her Chinese circle, and always, always invite me. I never wanted to go. But I told her she could, its ok.
She would hang out with chinese guys somtimes. After I taught her how to properly drive like a sane, grown up , adult, she even taught her chinese male friend to drive, he kept failing his driving test.
Her other chinese male friend named bo, she really just spent time with him a couple of times, like when she need a ride to somewhere (because I totalled her car, but wasn't my fault)
I also got him to drink his first drink.
One time I took her to an irish pub, we were playing darts (and she kicked my ass) I went to go pee came back 2 mins later, some dude was standing there next to my woman, with my darts in his hand. As I walked up, he nodded his head down, handed me the darts, and walked away. RESPECT.
If you have a girlfriend or wife, who is good looking, men will always being trying to hit on her, pick her up, bla bla bla.
I've seen it countless times.
If a woman is going to cheat, its because you've either been acting insecure and jealous, or letting her walk all over you.
It's fine if your brother in law has a strong frame.
A woman who has high interest in you will be calling you all night anyways when she is out with her friends from my experience.