Nope, there were no kinds of explanation or explicit mentions of abuse. Just things going for the worse I think, maybe they started fighting or drifting apart....I kinda want a clearer explanation about why the mom left the dad.
Was he taking his frustrations out on her? If so, yeah. I can't understand leaving.
But if she just left him because he was stressed/depressed, and took his son in the process...
I need this question answered now. Was it implied that the father was abusive in earlier chapters?