I don't understand Michael's reaction when he sees Theodora with the baby. Does he think the baby is hers? Does he think the baby is his? Or like the girl at the train station, does he not know where Theodora got it? Is this the film-maker's way to tell us that Michael & Theodora had been intimate?
Yes, I think the assumption was that they hadn't been intimate so he jumped to the conclusion that she must have been with someone else and that she'd been putting on an act pretending to be innocent Theodora Lynn of Lynnfield. I find the townspeople's reaction even more hilarious as they have known her for her entire life and she surely wasn't out of town for long enough to have a baby!
she surely wasn't out of town for long enough to have a baby!
It does not take very long to deliver a baby. She would have had to become pregnant about nine months earlier. Some women can conceal that they are pregnant for a long time, especially if it is the last thing in the world that anyone would expect.