It's safe to say, I just did not get this movie. But I preface this by saying this third in the trilogy is the first one I have watched. In doing some research, apparently in the first of the movies, the Liddle family is fairly dysfunctional and super annoying. In the second, they lose their maniacal tendencies but retain their penchant for stirring up chaos.
In "Baby", everyone is super chill, even Jacquie who apparently was a real control freak. She is pregnant with a very big round baby and is on the couch with her husband and hoping for a peaceful Christmas (for a change.) Her family descends, but they are nice and normal! They are are beautiful and handsome with great clothes. Jacquie's house is beautiful if a little sterile. This kids were happy and spirited but well-behaved. I was confused by who everyone was and who all those children belonged to. I got the 3 sisters. And I got that Jacquie was marrying a man with two kids. Where is their mother? Is she dead?
It didn't seem to have much of a plot. The second sister, Treena, played by Latonya Williams, who I have really liked in other productions, and her husband are about ready to adopt a baby boy. I think one of those kids may be theirs as well. The younger sister discovers she is pregnant and is struggling to tell her boyfriend. Meanwhile, he is struggling to propose to her. I think she has a child too. The best scene in the movie was when he was trying to propose while she almost throws up on him. Luckily he manages to propose to her before she tells him she is pregnant so we don't have to go into all that "He only wants to marry me because I'm pregnant" scenario.
There is no real focus to the movie. We are just plopped down in the middle of this rich, nice, beautiful family and we just soak all the perfection in. There are some blips: The kids trying to get a reclusive neighbor to come out of his house, The family matriarch is stuck in Utah by an avalanche (while on a ski trip-of course), and the adoption is falling through. But it's all unconnected. There is also a Christmas miracle at the end involving Jacquie's pregnancy and it is as much a miracle as a Virgin Birth would have been. So that was Christmassy. I think I am really interested in seeing the first and second in this trilogy, but probably not The Liddle Family Christmas Vacation, if there is one.