I don't think it was meant to be a secret. We had been talking and she was becoming pretty affectionate.
I think the plan was this:
- Find a reason to get me to come to her room
- Call me, express reason
- Get me onto her bed
- Encourage me to get comfortable
- Gently pressure me into sex, possibly more than once
- Send me back to my room, fatigued but satisfied
If she were planning it, I unintentionally shut her down after the second list item.