Maybe all your house guests should be issued with ear plugs when they arrive? And always say 'well you're more than welcome to stay BUT I must warn you now, there WILL be sewing machine action at odd hours!'
I say it's your house, you're doing a great kindness to put them up so you sew girl! BUT I must admit, that if it was me, I'd feel the same as you - I'm very good at telling other ppl to stand up for their rights but not good at doing it myself! :lol: