if shes the mother of the child you have no place saying wether she can or cant see the kid.... if youre insecure about the situation then maybe there is something more important that u need to worry about... like why would you e insecure if u knew he trully cared about you... look at it this way this will either break you guys or bring yall closer... let the events take place sit back and see what happens if he fucks her than why waste your time with him.. if he doesnt than maybe you can lay your insecuriies to rest....