Originally Posted by TroubledWater
But one day my long-time partner comes home and seems very distant. She goes up to our bedroom and I don't hear from her for a while. I go up and find her crying.
This is the big red flag for me. Issues this big don't just appear overnight. It is more likely that things have been unbearable for a while and she hit her breaking point. There were probably a million signs that were ignored or overlooked. Adding another adult and a child is a lot of stress. You two need to seriously sit down and talk, when she is calm, and find out what the real problem is. It would be good to hear her side of the story.