Women are emotional and not rational (mens are rational), she said yes and she means it, but after the sex, no alcohol, etc... she is less into fantasy or into sex talk. Her mood changed. But it is a good thing, you know that when your girl is arroused by you she can talk freely about sex.
Don't push it, just make her feel special and loved. Don't talk about it too often, if you have sex once a week with her, talk or use a black dildo foreplay every two weeks for example.
