Monica presents Ian with lasagna, which in her mind is his favorite food, and Lip is not even coming to this awful dinner idea, and Bob just wants to talk more about moose and squirrel, and Fiona tells them both to suck a dick. Then Lip comes in and once again Bob goes after him in a very specifically maddening stepfatherly way, because Lip is the man of the house and doesn't give a shit about Bob's authority which is two things that drive her crazy, because she's an asshole but a very realistic asshole. Lip produces the DNA results and we learn that... Ian is not Frank Gallagher's son.
Which is interesting, because obviously Lip and Debbie are Frank's -- they have that cunning genius thing going on -- and Fiona was only saved from carrying on their legacy by their monstrous example, but I can totally buy that Ian is the odd one out. At first I thought maybe there was a morality factor, but even though Debbie is a grifter that's something she has in common with him, so it couldn't be that. And God knows when we meet Ian's dad -- one of Frank's three brothers, according to the DNA test -- he'll probably be no kind of prince either.
Karen comes home all a mess, and heads down to the basement to trash Eddie's creepy clown paintings and generally fuck shit up, and it's pretty liberating, and she's angry at exactly the right thing: He deceived her, in order to humiliate her, which is the thing to be embarrassed about. Not anything she did, or anything he said, but the fact that she fell for his bullshit. That she was convinced it was possible he loved her, for a second; that he was capable of love and not just the endless sickness that is his birthright. Sheila throws her arms around her daughter and holds her very, very tight and if you listen closely you can hear something go krik inside Sheila's brain. It's something breaking. Open.