And she's kinda shy so I'm not too sure if she's ready to smash.
Delicate balance here, but in my experience, you have to "let her know" and then gauge her response.
No response, means that you have to lead.
The backdrop is that besides showing her a good time, sex is an important part of a HEALTHY relationship.
And deeper into the background - you're in the marriable age group, and she's a little north of the prime.
So the sex might mean more....
That said, the shy/quiet ones are often lying their asses off.