thinking out loud while horny

hey there guys i just got back from a pretty wild night. my ex and i broke up about 3 months ago but we still have this thing where we sometimes get together to kind of be friends with benefits. last night was one of those nights. so i went over to her place around midnight. she lives in this cool old house right on the edge of town. it had been a while so i was like super nervous at first but then as soon as we started talking everything felt kind of normal. we ended up just hanging out drinking and watching movies for hours, really nice night. but i could tell from how she kept looking at me that something was coming on strong. and when it got late enough, i mean real late like 3am, she asked if i wanted to maybe stay the night in her spare room. and i thought okay this is a weird thing but i said sure. so we just chatted some more till midnight or so, then i went over to crash in the guest room. only problem was once i got there i couldnt fall asleep for like an hour! all the sounds of her house kept me wide awake thinking about everything that had happened. and how close she looked when we said goodnight. so around 2am i snuck out to the bathroom down the hall from where she sleeps. saw a little light under her door so figured shes still up or maybe tossing and turning like i was. and then right before walking back to my room, i peeked in on her and saw that she was sitting up with one hand kind of touching herself. i couldnt believe it! but at the same time i felt kinda turned on seeing how close we had been getting tonight. so instead of going straight back to sleep i went into another room where i could still hear her, and just listened for a while till she fell asleep again. then once she was out cold i crept back into my bed. i dont know if this is all that weird or messed up but it got me thinking about what else might be going on between us now without any real limits. so yeah id love to hear your thoughts guys - do you think im crazy for spying like that? or maybe i should just come out and talk more directly with her about whats going on? thanks as always :)