Does he want out of their relationship

Sam

I really need some advise, I saw my friend last night and while talking she burst into tears and started telling me about her fiancé.

They have been together 6 years and they have a 4 Year Old son. She has always wanted to get married and have 2 children she has talked about this for years.

But her fiancé is sending her mixed signals. He is happy not to use protection and says accidents happen and then the next moment he is telling her he doesn’t want another child and may never want another child.

He is also doing the same with their wedding he will book to go and see venues and then will change his mind and say he doesn’t want to talk about the wedding anymore.

I’m trying to be a supportive friend but I feel like he now just isn’t invested in the relationship.

Am I wrong? I’m really concerned about saying the wrong thing to her and making things worse.