I agree that a bus buddy is a good idea, and I agree with ajinlove that you should give it a try and see how she does, instead of assuming that she can't handle it. Don't spin her up by worrying about it in front of her or spending a lot of time planning how to handle it - trust her and try it for a bit. You can always pull back by driving her, but it will be harder to start up the bus later if you don't start that way.