A friend asked me to babysit for her 2 DC all day tomorrow (7-6) not a problem said that was absolutely fine.
She has called me once cancelling, and then rang again asking if in fact I could still babysit. I said yes it was still OK. I then receive a text saying "I might not need you for Saturday will let you know". That was on Monday.
I tried ringing her this morning and have sent a text message asking what is happening but no response.
I am happy to babysit for her if she needs me but I'm getting less happy about hanging around waiting to find out. If I've got her DC then that's great no plans need to be made to entertain DD as they will play happily together. However if we don't have her DC myself and DD have been asked to do something tomorrow which I would definitely do but need to let them know by 18.00 so I doubt that will be happening since my friend doesn't think actually telling me what's happening if necessary 
WIBU to send her a message saying "can you let me know if I'm watching DC or not because if not I would like to make plans"?