Blathy is nervous to see Tina's mean parents.
they give the kids a plants he's alergic to, Tina's mom nags her about doing EVERTHING wrong. which leads her to join a band with the dog-rapist nextdoor.
Daddy-in-law is nice to Blathy but it's all a horrible trick, embrassing him infront of Killborne.
Pazuzu doesn't get to see Lady Gaga. Uncle whatever has a unicorn tattoo and is sick with worry when he hears the in-laws' plan.
so, at a TGI-Xmas, Blathy is pushed enough that he beats up his Dad-in-law and Tina fights with her mother- FINALLY! the kids are there, but the daughter is texting and doesn't notice.
Satan collects the in-laws, Killborne is impressed again and Tina& Blathy make-out in a publlic place...again.