Dear Prudence,
My father has long been very devoted to one of his employees, “Jon.” Jon doesn’t have much in the way of family and started working for my dad as a teen. Jon has often joined us on holidays while I was growing up, and my father often referred to Jon as his son or his kid. This never bothered me. I didn’t mind that Jon was close to my father. However, Jon was never close to me. We never had a sibling like relationship or even interacted that much given that he is six years older than me.
Well, Jon got married last year to “Becca.” Becca was in the foster care system until she aged out. Becca is obviously excited to have an insta-family and very, very pushy about it. She has dropped by the house more than once unannounced and got upset when my mother told her that they really don’t like unexpected visitors. Also, Becca introduced me as her sister-in-law at a lunch event we both ended up attending. I was caught off guard, so I didn’t say anything at the time. I have fended off invitations by Becca, but nothing seems to make a dent. My mother is uncomfortable with the situation as well but doesn’t want to make a point to hurt Becca. My father and Jon are very much the stoic, emotionally constipated types. Becca seems harmless, but this just weird me out. It is a small town, and I have started working for my father as well. What do I do?
—Only Child