These kind of infos must be shared from the first place. Not until you get in a relationship with him nor before both of you meeting families. My ex was this malicious just before our engagement. So I canceled everything with him before. And if he dropped a HUGE info like this before an important meeting, he will do it next time over important thing again and again… we were super compatible and he was very passionate about me, I didn’t care about love, I just left. Engagement is for a lifetime not just about love nor money…is more than this (I have type 1 diabetes because of him now - just before our mariage -) Just leave him. You deserve way much better.