I'm glad the spay went okay
Her being spayed doesn't have anything to do with the humping. If she was in heat, she'll have all kinds of crazy hormones right now which are causing her to hump. The hormones don't leave her body the moment she was spayed - it will take a few weeks for them to be gone completely. So right now she's probably going to act like she's still in heat until the hormones have a chance to die down.
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~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.