So my bestie, we shall call sarah is getting married at the end of this year. A few of us went on a night out recently, including her fiancé jake, and his female cousin annas long term boyfriend zack who is meant to be proposing to Anna soon. Anna didn’t come out that night, and Towards the end of the evening, zack squeezed my bum. I immediately said what are you doing and told him to stop to which he replied ‘no one is looking’, it made me feel uncomfortable and I then just kept my distance, I didn’t want to make a scene ... My dilemma is that they are a really really close family, all go out together and very much involved in each others lives. I am going to Sarah’s hen do soon and Anna will be there. I don’t know whether I should say anything about this inappropriate behaviour to Sarah or not... i feel awkward as they are all so close, and I worry that although I think it would be the right thing to do.. if I do say something all that would happen would Anna would stay with Zack and end up just being awkward and off with me? I guess a big part of me worries that I won’t be believed. What would you do? Let sleeping dogs lie and let Anna find out another way her fella is a sleaze bag or say something and cause a potential shit storm right before my best friends wedding and hen do?