I'm confused why am I being blamed

So my husband has this friend on fb who's not all here and she's constantly messaging him random things like how or cold etc... and he'll show me and we'll laugh trying to make out what she's trying to say. This morning I received a notification that she's following me and I show him and he tells me to block her and that for me to stop tagging him in random pics or videos bc that's probably how she saw my name. Mind u nothing in his fb is linked to me no tags no Pixs nothing so I have no idea why or how she found me...so bc she decided to look n follow me now my husband wants me to stop mentioning his name in any sort of way on fb does that not sound suspicious? Then he wonders why I think he's ashamed to let ppl know he's married to me😢💔