I think I'm along the opinion of the others ! I would stick to the dcf you have and let her know when a spot comes available . I believe it is more professional . I'm not passing judgement on anyone else or their choices , it is just my opinion and how I run my business . I have had my share of being taken advantage of and being "awesome " and "a life saver" one week and losing the same family the next week over a sick day . It doesn't matter to me how many times peoples behaviour effects me , it's how my behaviour effects people that I am working on !