Kate & Leopold

Ok, let's forgo the time travel paradox discussion. Instead let's follow the basic plot here. First, Kate and Stewart have a relationship, and, from what the movie suggests, a fairly serious one. Then Stewart goes back in time and pulls his great great grandfather, Leopold, forward in time, who meets Kate and falls in love with her. Then, Leopold returns to his own time only to be followed by Kate. At the party, he then announces that Kate is to be his wife. We then presume Kate and Leopold get married and foster children, one of whom is Stewart's great grandfather. Wouldn't that then mean that Stewart had a fairly serious relationship with his great great grandmother!?!?

Ew.