Near the end of the film The Theory of Everything, Stephen Hawking is invited to meet the Queen and be offered a knighthood. Jane goes along too, although it's not clear to me if the invitation from the Queen was extended to her as well or if Stephen asked her to come along.
This really confuses me, as Jane is not part of Stephen's life at this point in the film. She appears to be living with Jonathan (I'm guessing they are married, since they did marry in real life) and Stephen is involved with his caregiver Elaine. I can't imagine why the Queen would have invited Jane along with Stephen, so why did Stephen invite Jane to go with him rather than Elaine?
I don't know if the answer to this is in the film and I just missed it or if there is some real life reason that didn't get expressed.