I want to start a family in the traditional sense like my parents and grandparents have done before me, so I would be disappointed to find out I was dating a transwoman. Similarly I'd be disappointed to find out if a woman didn't want children or wanted to live a lifestyle incompatible with my own. It isn't going to work out and I'd have to ultimately call it off.

It's not about 'who's at fault' really. It will sooner or later come up and it is better sooner than later for both parties. If I'm dating a woman and she doesn't mention that she already has children, which is a big deal for me, then we're both just wasting our times because that's something I can't compromise on.

I don't know why this even needs to be stated, but violence is not an option in either of these cases.