Hattie is looking to get married. Eric is having none of it.
If he loses his sister, then who would do the cooking.
When Hattie makes arrangements to meet someone, Eric does his best to put them off by appearing in disguise.
Later Hattie thinks she has found Mr Right. It's Charles Brown but he is shocked and horrified at the idea of marriage to Hattie.
So Eric sets Charles Brown up with a coarse woman who is supposed to be his fiancé.
It was surprising that Hattie never noticed that Charles is not the marrying kind. Diane Holland plays the fiancé. She was more famous as being even more snootier than Charles Brown in Hi de Hi.