How would you feel about this?

[EmiBuch]

A friend of mine has an 18 year old son, he is secretly having a relationship with a man she knows (he is in his early 40's) that the mother doesn't know about.
Personally I wouldn't be happy with this if I were (knowingly) in this situation and I'm wondering how other women would feel?

He's 18, not even his DM could put a stop to the relationship.

Maybe she does know/has an idea but just doesn't feel the need to broadcast it.

Put it to the back of your mind and wait until your friend tells you.

Even if she wouldn't be happy about it, she can't realistically do anything about it. He's an adult.

I think I'd be concerned, not gonna lie, about the age difference. However, I'd be having to trust that I'd raised my son with good relationship awareness and boundaries, and always be open and supportive, and respectful of his relationship and personal autonomy, so as to keep communication lines open, and our own relationship strong.

I wouldn't be happy, but there's nothing I could do, I would probably welcome them as a couple in order to keep my son close to me if I knew about it.

The age difference alone should be a reason to be alerted. That's pure predatory behaviour from the older man, no way around it.