6 months into a LTR with this girl everything has been great thus far and I have tried to apply red pill principles with good results. LTR and I have always slept together a few days a week when we hang out partly due to logistical reasons. This has always been fine. Recently though, her behavior has been strange. I've woken in the middle of the night several times (often several times a night) to find the bed shaking and her moving slightly. At first I shrugged it off and continued to go back to sleep and assumed I was imagining it or dreaming. After a few occurrences I realized I wasn't dreaming and stayed up to figure it out. Last night we went out for a friends birthday to a bar. I drank while she did not she was DD and we went back to her place where I initiated sex. Later I woke in the middle of the night to strange sounds and motions again to discover that she had been masturbating while I was sleeping. Everytime I woke up she would stop wait to see if I was sleeping and then continue. If I made a sound or moved she would stop immediately. Eventually I reached my hand over, still not 100% sure what was going on, and asked what she was doing. "Nothing" she said, mimicking a voice one has upon waking and rolled over to sleep. After laying back down quietly for some time low and behold it started again and lasted only a couple minutes to where she seemed to achieve orgasm and roll over to go to sleep.

I am very conflicted over this for a few reasons. While I will admit discovering she was masturbating was kind of hot at the time it also made me concerned as to why I was not a part of it. Sure it was very very late and I had already fallen sleep but we had already had sex prior to this. It seemed as though I was unable to meet her satisfaction during sex and she waited until I fell asleep to pleasure herself. This bothers me for obvious reasons. Sex otherwise is good. She tends to be very submissive and allows me to be naturally dominant in bed which I enjoy and she does as well. I should note that she has never initiated sex and red pill me understands that it is the man's responsibility to initiate if he wants sex. However, more and more lately she has been treating my inititiations as a way of making her obligated to have sex and see it as a chore.

I am very confused. We have good sex daily or close to it. She is not otherwise an extremely sexual person with a high libido. So why would she feel the need to pleasure herself without me when I'm right there especially after having sex and feel the need to hide it or deny it when I confront her.

My instincts say this is a sign she is unsatisfied or losing attraction but every other aspect of the ltr is great. Am I overthinking this or is something going on here?