If H says he can't do that, you can just say, "Well, that's fine. You can make some other arrangements for her if you need to." The SA gives him a month. It's up to him how he deals with it. Leave it in his lap and don't take any bait that leads to you having to deal with it or think about it. (Of course, you wouldn't leave your D hanging. Have a plan that you can implement at the last minute, if necessary, but don't give one inch with H unless he's completely unavailable when it's time for you to leave.) Act as if this is H's responsibility. Because it is. Act as if he'll deal with it one way or another because you're not going to fix it anymore.