Mikey's parents need to revisit the custody arrangement. I really think he might benefit from staying at Mom's full-time and seeing Dad on weekends or, as he gets more into school activities and perhaps sports, every other weekend.

LW needs to step back from her life and ask where this is going. She bought a house with this large infant she is sleeping with. She needs to go to couples counseling, alone or with him, and there needs to be a come-to-Jesus moment where he commits and grows up or doesn't. (Spoiler: he won't commit and grow up.)

If she does not do this, she will carry this man and all his problems on her back all her life. I don't care how proficient he is in bed (given his selfishness elsewhere, not very), she is betting everything she has on his dick and he has nothing else to offer. LW knows all this. She wants someone else to say it so she can argue back and re-convince herself.