It's Christmas Day. Mum has made a fantastic Christmas dinner, although Adam is, as usual a bit confused: "Don't you think it's a bit weird we do all this Christmassy stuff?" "Why?" Says Mum. "Um, maybe because we're Jewish," says Adam.

The boys are delighted that Grandma is coming round, but horrified that dad's (Martin's) mother - 'Horrible Grandma' - is coming too. "When will she die?" says Jonny. "That's a terrible thing to say". Says Mum. "Is it?" says Adam. "No, not really," says mum. "Martin, when will your mother die?". "In about an hour, hopefully" says dad.

Horrible Grandma turns up with her equally horrible dog, Boudacea, which has to wear an oxygen mask ("Her lungs have rotted away" says Horrible Grandma). Horrible Grandma hates Mum's "horrible dry turkey", and Mum is distraught when Horrible Grandma brings turkey with her to eat.

Dad and the boys are jealous, as they too secretly hate Mum's dry turkey. Later, Jonny gives Adam a present. Adam tears it open, and a mass of spaghetti bolognaise falls straight onto his lap. "I must give you the recipe," laughs Jonny.

After dinner, tensions mount, as the two grandmas have an argument that develops into a proper grandma fight. And then Jim turns up, dressed as Father Christmas...