we have builders in working in half the house, and masses ofcrap everywhere in the other half i'm in the process of sorting out. I can just about deal with it, and carrying on with work, normal life etc, but i've just said no to DSD (adult) who wants to say for a weekend. I said no to her because of the builders and she said "oh its ok, we'll (her and DP) would just move stuff around make space for themselves". wtf? this now seemed a bit cheeky. i put my foot down and said, really - no! Am i the evil step mum, or is this an appropriate boundary?