Brady Bunch Syndrome
Someone who has ongoing fantasies about the new step children and in-laws melding together into a cohesive family unit even though the family members of your new spouse think you and your children are pieces of shit... and you and your children continually prove them to be correct.
What the hell was he thinking when he married that obnoxious sarcastic bitch? That leech has the Brady Bunch Syndrome and keeps trying to force herself and her demon offspring into our family functions; and every time they're around they just throw insults and try to start fights.