I have received a message from an entirely random person on Facebook to say my cousin's husband has been cheating on her. There are no facts. The person messaging me is showing as living in the same town as my cousin. It simply says 'X has been cheating on his wife with my girlfriend'. My cousin had a baby 4 weeks ago. The profile of the 'boyfriend' seems genuine. I don't know why I've been messaged? Maybe other people have been messaged too? I've decided not to say anything. It might be that my cousin already knows and they've sorted it out between them? I don't think it's my business. I just feel really sad for my cousin if her husband has been or is still cheating on her and they have a new baby.