Honestly I'm baffled if she's pregnant. Their house is nowhere near ready so if she is I don't think it was planned. I feel a bit bad if she didn't think it would show on her goodreads though, I almost feel guilty gossiping about such a private topic if it was meant to be a secret. She reads a ton of diverse books so perhaps this was just curiosity, but her deleting it makes me think that it's truly happening.
It's funny because while watching her latest vlog I was wondering if Zack would soon propose to her or if they wanted to get married in the near future. They have been dating for quite a long time and somehow their relationship still feels new to me, probably because we never really see them together and they keep their relationship private.