With my girls it depends on the hen. I have some that will not be put off brooding and others if you move them they lose interest. I have read that the longest a broody hen has sat was 11 weeks (poor thing). I had a hen hatch 4 ducklings which is a week longer to sit than hens eggs, and she was quite happy. She may well be broody when you move, if you want her to continue put her with some eggs when you move and you may be lucky. Otherwise she may lose interest and go broody later on. Cant predict with hens, they haven't read the book and do their own thing anyway. Good luck.