My lovely mum lives 10 minutes away from us, and loves to randomly pop in at least once a week. We do have her and my dad over for tea once a week, and often see them at the weekends too. The problem is that she often chose to just pop in at really inconvenient times, often at 4.30/5pm when me or DH are cooking tea, and the DC are all coming and going to various activities, and I can't really stop for a chat. Today she came over as I getting tea on the table, one of the kids was getting ready to go out the door for cubs and one of them has a friend over. I find it really hard to say to her that now is not a good time to come over. Any tips on how I can do this gently, so that she gets the message that it's best to arrange visits in advance, or not to pop over at tea time?!