Awww Jods - I really don't think cats 'do' resentment.

She's just going to be happy to be home with her special Meowmie. If she's still a little groggy she may want to sleep - leave her to it. Cats know whats best for them.
Just so long as she's got some water and her litter tray close by - she'll be fine. Most cats don't want to eat the moment they return home from surgery.

Don't worry about this, you did the best thing for your little Pixie - none of my female cats have changed at all after being spayed.

{{{Hugs}}}} to you and nose kissies to Pixie xxxxxx

Lynne