I(28M) found my wife(29F) in a compromising position and I don't know how to feel

I am going to be short and to the point. Yesterday night I was sleeping peacefully. Middle of the night my sleep broke for no reason. I opened my eyes and saw my wife on top of me. At that time I was half asleep so I thought it was a ghost or something so I pushed her back hard. I recognised it was my wife by her scream. So I hurriedly switched the light on to see what happened and found her on the floor completely naked. I brought her in bed and did a little check if she was alright or not and then asked her what was she doing on top of me in the middle of the night.

She immediately starts crying and after a lot of coaxing and assuring that I won't be upset... She tells me that for the past 2 months she got a habit of waking up at night and then masterbating to me on top of me. And since the past day and a half he has been trying to avoid me. I tried to tell her it's okay and if she has some fetish or not... Idk if that was the correct move. Did she think I was shaming her or something? I mean I just want to talk and get to know her preferences. I mean even if this is a little weird, she is masterbating to me after all and not fucking some other guy so yeah I don't have any problems if she wants to do it. And on the other hand I also want to know if I am not able to satisfy her fully or was this just her thing.

Anyway to make her stop avoiding me?

Tldr: I caught wife in a weird fetish and now she is avoiding me.