In Jack’s recollections from his childhood, how does he describe the altercation that took place between Ma Britten, himself, and Sophina in Chapter 60?

On one job, Jack and Sophina are discovered by Ma Britten when they fall asleep in a house they are robbing. Ma Britten sends Jack and Tom out of the room exclaims to Sophina behind the closed door that it's been five months, implying that Sophina is pregnant