UPDATE::: tell him or not

Update: I finally told my husband. I told my husband that his daughter not only go out with friends that also with her guy and of what she told me that she was pregnant as a joke or I don't know if she told me just to test me or thought she was pregnant because later on days she ask me if have pads. After I told my husband, he put a mean and serious face. He told me: don't worry about her and told him: I worry about you that your ex is going to reclaim mad for you letting her go out or something. Or his ex would say: your wife knew and not me or something. He said nah if my daughter get pregnant there is nothing that I can say. His daughter is rebel because she think that because she is 18 then she is free, she go out with friends without telling her mom, his daughter lives with her grandma. Will see what happen laters...wether she ended pregnant or moving with her guy..let's see what happen. Hope not bad news lol
My husband and I have a one year old son. His 18 years old daughter stay with us only sometimes on weekend but not every weekends. Because she stay with her friends on the weekends and sometimes with us. The problem is that she do not go with her friends, she ended staying with her guy BUT her mom doesn't like the guy. So she hang out with him behinds his parents backs. I don't know if my boyfriend knows because she tell him that she is staying with her friend. And she come on Saturday after 12am. That's why I not like her staying in my apartment because of the way she is, I told her don't cause us problems like hiding and then your mom will blame your dad. I don't know if to tell my husband that she do not hang out with her friends if not with he guy. But I believe that if I tell my husband then she would end hating me. I know that she is older and can do whatever she want but not to hide.