Ever since DS was born my younger BIL decided to use "the" in front of his name when speaking about him. So rather than saying "How's Jack* doing?" He'd ask "How's the Jack doing?"
MIL has picked this up and we've just received our Christmas card addressed to me, DH and the Jack.
This is really starting to irritate me for some reason. AIBU?
*His name isn't Jack but it's similar, trying not to completely out myself in case MIL is a secret mumsnetter.