Second post!
I envision May as mid- to late teens, and she will act accordingly. I've decided not to change May's age, so I'm sorry if it's a little off. Just keep in mind that she's still a teenager.
I do object to May's 'playing' Henry. Although they have a very good relationship, she's a bit too old to play with him, I think.
To May's mum and da - Please, I am not trying to portray you in a bad light! I merely want to tell this story from May's point of view, and right now she's angry at her parents. Forgive me if I took liberties with your characters, but I am still very new at this. I'm not sure how much is too much when it comes to other people's characters. You can yell at me.
Melisil - As to whether she would object to babysitting, it all depends in how you approach May. If she is ordered to watch Alora, then May will do it, and hate every second of it. However, if Alora were to make friends with May herself, then she would be glad to help out. She shouldn't be hard to win over. Another option is that May is commanded to watch Alora, and eventually the little girl makes friends with her. That works too.