Friend got offended

Hi,
i am hosting several sleepovers and playdates at my home,by calling over friends for my daughter.
recently i called 2 friends .they played very happily and had good time.
one of the moms got offended just because i did not praise her daughter instead i praised other girl. I never said any thing bad about her daughter.
she shut me off now, and she is upset .She thinks i am jealous of her daughter which not true.
when i called her she showed me her displeasure.
Now i am not sure to send my daughter to her place and i do not know whether she will treat my daughter good.
what should i do.
Please help.