She started riding me differently. She aid she just did what felt great and tried out riding a more slow and gyrating her hips?

She hasn't done this before. How do I know if she learned this somewhere else. I have her location, she hasn't been anywhere. But when we were broken up she was sexting a black but reading her texts she made it clear she wasn't into sex at first. She also did this with me. Should I believe the obvious? Or is this too good to be true? Or?
She started riding me differently. She aid she just did what felt great and tried out riding a more slow and gyrating her hips?
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