She does not leave the game, but becomes impossible to date. I checked the scripts, and I can't find any evidence of the story developing beyond accepting or terminating the pregnancy, so I guess either way you're stuck with her.Does Alexis leave the game if I tell her to terminate the baby if I agree, do we get married and the game ends? She told me when we were on a date and I thought the LP I gained during the date would stay afterwards but it still went 0. Does she return?
EDIT: *Does she return if she storms out?
Currently, she can leave the game after the restaurant date, the issue about leaving her to pay the bill in the restaurant, the cinema date, and a cheating conversation. Nothing related to pregnancy (yet).
It is possible that once such content gets produced by the dev, that the story progresses beyond that point.