Wife And My Brother

We are married for two years. My younger brother stays with us. My wife told me that he tries to hug and squeeze her, and then pretends as if nothing happened. I told her to cooperate with him. She spoke to him and told that it's okay. This is very nice now. They are having sex; no issues. I wonder is this common in India? She told me that one of her friends has similar situation.

— Ettan, 30