Hi, I'm not sure if this is the right place to be asking this but I need advice and this seemed like the most appropriate place.

The advice is in regards to unwanted pregnancies for men.

I met up with a female friend yesterday and she advised me she's been seeing a new guy for about a month now, she also advised me she's actively trying to get pregnant with this person.

I asked her if the guy she's seeing is aware of her intentions, she confirmed she's been telling him she's taking birth control when she has not been.

I am completely appalled by her actions and told her this is unethical and to be honest, fucked up.

Advice I'm looking for is, should I tell the guy she's seeing? He has a pretty uncommon first name and I'm certain I could locate him on fb. Secondly, if she does get pregnant, what kind of rights does the guy have?

The situation is a bit complicated as I'm an ex partner of hers and I'm just concerned even if I advise this person, he might not believe me? Also if it's not him, it might just be another poor guy.

Any constructive advice is appreciated.

Edit: I've stopped all contact with this person and created a fb acc and messaged him 'Just letting you know, the girl you're seeing at the moment is not using any form of contraceptive and is trying to get pregnant. Use a condom.' Thanks for all your input.