daughter won't sleep for daddy

Alyssa • Girl mom: 16', 18', 21' 💕
Does any one else's baby not sleep for their husband. Or is it just mine. Haha god love him. He tries everything and she just won't do it. His work schedule is two weeks on two weeks off and we agreed on his two weeks off instead of having a sitter every day she would be with him. I personally think it's just a female thing. She will sleep for everyone else.. She won't sleep for my dad if he tries either. I know she can sense that he's having a hard time. Just wondering if anyone has some tips..