I think my mom (41, teacher) fucked a student's Arab father

My mother (41) is a teacher at a primary school. In her class, there was always one boy who caused trouble, which meant she often had to talk to his father (27). She was also very busy with work and not often at home, which also annoyed my father.

One day my mom forgot something at home and asked me to bring it to her. When I arrived at her classroom, I saw the man's son standing in front of the class and told me, "I didn't do anything."
This surprised me. I waited outside the classroom until they both came out. The father greeted me with a grin and "assalamualaykum" and shook my hand.
I was a little shook because his hand was wet and kinda sticky?, but he didn't seem to mind. I found it odd but didn't say anything until I noticed that my mother was talking to the father unusually often (because of "his son's" behavior).
One day she was gone overnight, and when she came home the next day and I was doing the laundry, I saw dried white stains on her bra etc., and her panties were almost torn apart?..

But I mean, she's a beautiful Russian woman and she was really relaxed at this time(which she normally isn’t), so I think it maybe got some more pros than cons?

I have a feeling something's up but I’m trying to stop having those dirty minds..

What are you thinking guys?XD