So dh became facebook friends with a woman from school whose child is in dd's class. All innocent - I know her too and chat regularly. However, he seems to have a bit of a crush on her and I think she's noticed. It is noticeable that every picture she posts and every question she asks, he responds to instantly. Some might say he is being helpful, but she has started to notice and has mentioned in a jokey way that she feels a bit awkward about it.
How do I gently steer him away from doing this without embarrassing him or telling him what she has said?