AITAH for introduction my friend for a potential job?

My cousin's sisters inlaw has a project he wants done. I wasn't experienced enough to get the job done so I reffered to a friend. I asked her not to do anything until he states he will pay her. She is too nice so she did research for him. She didn't share anything with him. It seems he does not follow through. I found out he is screwing giver my cousin for a lot of.money. I had a mutual friend stop talking to me because of it. She says it is my fault. My cousin is looking for investors for the project. She has lost hope. I think it is promising but I don't know what to do. Am I an asshole for telling her about it too soon? She is struggling and it hurts me. I wish I could do more for her. Should I feel bad for introducing her to him?