I would be interested to know your thoughts on the following situation. Last week I was invited by my sister-in-law to join her with some of her friends at a local pub for birthday drinks. When I arrived at their table, she introduced me to a new friend of hers, “Cathy” by saying: “Cathy this is my sister-in-law, Dubbin; she’s sensible like you!” Followed by an explosion of giggles. AIBU to think this was a bit strange?