“A Bad Moms Christmas” (**1/2 out of four) was an occasionally funny comedy sequel to the 2016 original about the same three under-appreciated and overworked moms (Mila Kunis, Kristen Bell, and Kathryn Hahn) who band together to rebel against all their chores for Christmas especially when their derisive families come to visit. Enough laughs for fans of the original but feels overstretched, and tacked-on happy ending rings false. Kunis’ usual engaging performance helps a lot. Christine Baranski is well-cast as (what else) a bitch and Kenny G. has an amusing cameo towards the end.