I was really irritated with this episode! The young man was obviously a good choice for the daughter; and no need for her mother to play these, ridiculous mind games. She was quite rude to him most of the time!
She wasn't rude. I thought he was expecting too much familiarity from a parent who'd just met him, for the first time. Then to sulk and decide to pack and leave, was too immature a reaction. It's all in the characterisation according to the script.
