It was my DS 6th birthday on the 1st of August & we had planned a trip to the build a bear workshop for that day so I invited my exMIL, his grandma, around the week before but she had no free days & said she would come the on the 3rd of August. On the evening of his birthday my DS came out with chicken pox so I contacted anyone we were meant to be seeing that week including exMIL. I had checked with nhs direct about the dangers as I am pregnant & exMIL was insistant she could catch shingles from DS & although I was told this wasn't the case left it that we would arrange a day when he was better. Last week was out as we live in tottenham & the riots were going on. I contacted her Saturday to see if she was available this week & she texted that she has visits on Wednesday & would pass by on her way home. (she is retired but does voluntary visits to recently bereaved people through her church) I said this was fine but did she know a rough time as we tend to go out somewhere each day. She has now got all stroppy with me saying she doesn't see why she should be allocated a time but as she was passing by after doing her own thing surely it is her allocating herself time anyway & I don't see how I am being rude asking morning, afternoon or evening. I have said that if she can not give me a rough time then I can not guarantee we will be home. AIBU???