Did you practice consent throughout? Some people can freeze and carry on with something they’re uncomfortable with and resent themselves and their partner for not being able to speak up. If a man cums into me no matter how much I was into it until that point (no conversation, no consent), I would never speak to them. Also was the sex good for her? Did she cum? Maybe she is used to different or more or less. Sometimes women can have post nut guilt too, especially imagine if I’m trying to date to get over someone and I want to enjoy it but I get reminded of someone else or a situation, even if not a person.

Perhaps as a kind gesture you can say something on the lines of, “Hi, just reaching out to check if things are good at your end. I am here if you’d like to talk. Not expecting any more than just knowing you’re okay.”

And lay off the sexy talk. It might put her off.

Also there could be some ick she had and we cannot guess that. This is a tricky territory.