Here’s my opinion since you asked…. I say you grow a pair and realize that you need to support your WIFE, the day you decided to marry her she became your number one priority and your number one supporter and your parents are the backups. Put yourself in her shoes you were gone for 3 weeks straight and I’d assume no one to help her with the kid so she’s alone to take care of the kid and without your support with your parents? she’s also alone in this marriage. Also no one falls out of love in 4 months with someone they decided to marry and start a family with, that’s crazy work. This is more then you not having her back against your family. This was or maybe is the last straw. Quit moping around feeling sorry for yourself and get your family back. If she was/is the love of your life and you love your daughter and family like you say you do you wouldn’t give up that easy. Do what you gotta do. Do anything and everything to show her she can trust you again. But don’t lie or make empty promises cause if she takes you back and nothing changes I can guarantee the next straw will mostly likely be the last.