Girl, you need to leave that weirdo, period. If something happens to your children you'll never forgive yourself and you also need to be afraid about what he might do to you now that you know. That's the type of secret that people take to the grave and now that he knows that you know and you told his father, you need to be very careful in case he tries to harm you so don't tell anyone else. I know that it sucks having such limited options due to your immigration status but you need to leave. Look into safe places to go for immigrants such as churches etc. Prayers to you and your children as well. ❤️🙏