My husband loves our two daughters very much...but the thing is, he's not their father. Should I tell him?

My goodness sake. May I know if the real father is interested in his daughters? Sadly it is done, the good thing is husband bonding with children start after birth so even the child is not his, he is fully capable to love the children as his own. Personally I won't tell him because it will just affect the children. (Yes is not the right decision but sadly for the sake of the children I won't) That is coming from a guy.