I'll let swimjim answers your valid questiona Perna but I'll share my thoughts - he mentioned he was married before and he told her he wanted to take it slow. She was giving him previous untimatums after 5 months of dating. Not all couples want to get married, especially after being divorced. Maybe he felt uncomfortable with feeling forced after only being together 5 months. When a person chooses to force an untimatum, it doesn't give much room for negotiations IMO.