My sister’s husband messaged me in a flirty way saying “send me your good looking pictures, let me see your beautiful face” Back then in 2021, I went to visit them and the husband wanted something to do with me secretly but I refused and didn’t tell my sister either because I was scared I would mess their marriage. They have two kids and just growing up. He sent this message today and I snubbed it but I’m afraid of opening it up to my sister, for the fact that she might divorce and I would be the reason behind messing up with her marriage.