My sister got pregnant on purpose, she said she was on the pill when she wasn't and now has a beautiful baby but the dad doesn't know it wasn't an accident. They aren't together because he didn't want her to keep it but it's amicable. Should she/I tell him what really happened or is it not worth the heartache when they have a gorgeous baby now (even though he doesn't visit them much). She said she doesn't feel guilty because she loves her child so much but I feel a bit uncomfortable keeping it from him. I see her point about not telling him though, as it wouldn't change anything and make an amicable relationship potentially really volatile which would be worse for their child