Honestly, that kind of sounds like my mom. My mom would go on these really strange moods and treat us horribly, she even accused my dad once of being inappropriate with me which is something he would never do. After I brought this up to her, she denied it, and she still denies it to this day - basically trying to make me think I made that up all on my own. I don't know what mental disorder this is, but its definitely a toxic one. The real victims here are the children, because they have to grow up with a mother like that which is extremely difficult. So if at all possible, don't subject your kids to a woman like that. You sound like a good guy, so go find yourself a woman who is more stable. A person like her needs some serious help and often times they don't get the help they need because they refuse it.