Yvonne (His Sister)

show her breasts

And her name was on the back of the VHS video as i recall. It listed the main characters and the actors names and hers was amongst the short list. I always woderd why when she was hardley in it!!

The only explanation I can think of is that given that poorer families generally have more than one child they were trying to emphasise the Coopers' working class background by giving them a second child.