Knock it on the head , there's a fine line between helping and interfering. It's too much . If your afraid of saying something ,try keeping your doors locked and don't answer if she calls, can she see you from the doors or windows ? That's what I did , as me to ex mother in-law came to my house too often , but my MIL was over domineering, she turn everything into an argument if you didn't agree with her, to the point of being aggressive, I'm glad I divorced my 1st husband. His mum was wanted to move in with us . She never took no for an answer . I realise you like your MIL but you deserve your privacy , time & space . If this isn't stopped you'll end up resenting her . She sounds like she has no " am becoming a nuisance" filter . Or maybe try a " this just isn't a convenient time " quote, with a very harassed look on your face . You sound too nice . She'll take you for a door mat . I've being there , it's not nice living your life around someone else . They eventually take over. Good luck ..