Last season there was a MIL who was trying to break up her daughter and future SIL before their wedding. This season, stupid daughter and now SIL are LIVING WITH Monster-in-law (WHY? WHY? WHY?!!) and, suprise, surprise, MIL was now trying to get them to divorce. The daughter had even had a miscarriage (probably from the stress in the house) and the mom had a "good - you shouldn't have a kid with him anyway" attitude.
I blame the kid of the Monster-in-law for allowing the crap to continue. NO WAY would I let my parent/family member talk to and act towards my spouse the way these people are doing. You don't like my spouse? There's the door. Buh-by!