I've written in detail elsewhere on here about my PILs - how they arrive earlier than agreed, book flights home for later than agreed, barely leave the house, how my MIL is a babyhogger - so I'll keep this specific. MIL didn't breastfeed any of her children, and since I also don't want to bf my 8wo in front of my FIL I come up to my bedroom (also a break from strained chat bcse by the end of a 6-day visit that was meant to be 3 days we don't have much to say). Today FIL and DH are busying themselves with flatpack furniture and DS1 is at nursery so it's me, the baby and my MIL. I was sitting on my bed feeding and heard my husband ask my MIL if she was ok. He had come out of the spare room (where they're putting furniture together) to find MIL creeping about on the landing. She replied that she was waiting to take the baby. She's now sitting on the sofa (in silence) with my sleeping baby while I strip the Xmas tree.
AIBU to think this is weird and yet more insanity-inducing behaviour or should I just accept that she is making the most of her time with her new grandson that she probably won't see for another good few months?