Oh man, Siobhan, im so sorry! Family is rough, i know! Maybe, as long as your family is visiting you should try and relax about his sleep a bit, yk? You are leaving him next week with his grandmother who doesnt listen to you regarding his sleep anyways, right?? So when you get back from holiday everything will be a mess no matter what and you will have to work on it again anyways! Try to think of this week as when you go on vacation and you dont have much control over sleep... Maybe that way you and your family can enjoy the visit more. Just think of it as, why work so hard if its all going to pot next week anyways! If your MIL is stuck with an OT, crabby baby thats her problem! Tell her when you leave that you are sorry he is a bit OT from the visit and hope everything goes ok, then let her deal! Then just try to enjoy your vacation and everything will be fine and cam be fixed when you get back.