What are the motifs in Blood Relations by Sharon Pollock?

Women's roles is a recurring idea. Lizzie's father wants her to consider Johnny MacLeod as a husband MacLeod is a neighbor who is a widower with three young children and is looking for a wife. With his daughter already in her thirties, Borden is worried that Lizzie will never go out on her own. The only solution for her is to marry. It's only natural, he tells her.