Breaking Point (aka Friday's Child)

Bobbie feels uneasy at seeing Jane pally with James, a newcomer to St. Luc. His family teases him about it, saying that he is merely jealous of the bloke.

Later, Bobbie realises that James is actually after Sadie's widowed mother, who is more sophisticated. Mrs. McStay is using James to lure Sadie away from Bobbie's household...