Nothing major, trivial stuff really but its bugging me and I am wondering if I should be saying or doing something more.
My sister had my kids (5 and 2) for the first time recently. They enjoyed it and so did she. However when they were there I got a text to say that they had their tea, liked it and were ready for bed and one of them had moved her dogs collar and she couldn't find it. 
I just replied that I was glad they were ok (the 2 year old was a bit upset when I left her as she isn't used to staying away from me). My sister can get in slightly funny moods sometimes and I had a feeling that she was pissed off that the collar had been moved, but god knows what I was suppose to do about it.
She said to pick them up any time the next day when I asked what time she wanted me to get them. Then in the morning I got a text saying "pick them up between 2-3. Giving them dinner and taking them out now" No, "can you come between 2-3" or anything. We could have been out somewhere although we weren't. We went up there at the time she said. I asked if they had been ok as that is what I thought the slightly off messages were about and she said they were fine. I knew she was going out that evening so I asked her if she was going out earlier than planned (hence the "pick them up x") and she said she wasn't, so I just left it at that. Then she made a point of telling me that DS (the 5 year old) had got nail varnish on her bedding. I called him in and told him off, that he wasn't to do that, old enough to know better, apologise to aunt, that sort of thing. DSis then said it was ok, she had already told him off.
A week later I got a text out of the blue asking if I knew how to remove nail varnish off from bedding. I have a feeling this is her way of telling me its still there and she can't get it off. I said I didn't know, try vanish and if not look up on the net as there was bound to be something on there. Then I felt obliged to help so I looked it up and there was something but too long for me to explain so I told her where to find it as it would be easier for her to read herself. She said vanish hadn't worked, no mention of finding out info for herself so I told her exactly what I had found. Got a text back saying "not happy, it was really expensive" then "I'll try it but doubt it will work"
I asked her when we picked the kids up about having them and she said she enjoyed it and would do it anytime, the kids liked staying there so I am sure this isn't her way of saying she doesn't want them again. She is NOT backward in coming forward so she would have said if she didn't want to have them again.
Is she expecting more from me or am I reading too much into it?