Re: Look after my child
You just panicked and took out your feelings on your sister - a pretty normal reaction when you're so worried and scared. You've quickly realised your mistake and are now kicking yourself.
Why not contact your sister to have a talk, which starts with an apology. Then you can go on to helping her to understand the practicalities of your daughter's situation and maybe writing down the basic rules. Don't let this panic ruin what sounds like a great relationship.
I'm sure you're a good mother and a good sister - be sorry, but go forward!
Best wishes,
Jane.