I regret doing it

I was 19 and had started being sexually attracted towards the wife of my father's younger brother. I used to sleep in the hall which had a bed and sofa set. One day she said she can't sleep in her room because her AC wasn't working. So, she requested me to let her sleep on my bed while I sleep on the sofa.

The bed and sofa were arranged in an L shape. We slept in a way that our heads were in the corner of "L" shape.

Now, it is my natural habit to put my hands straight above my head (like school punishment) when I sleep. At 2-3 AM, I woke up and found my hands around her neck (I was sleeping upside down and arms straight). I looked at her breasts and was out of control and started squeezing her boobs. She was asleep, didn't notice. I was doing it while pretending to be asleep. After about 30mins, she suddenly woke up and noticed my hands like that. She forcefully yanked my arms and tried to see if I was touching her on purpose. I pretended to be fully asleep.

Next day, she said that I sleep on bed and she would sleep on the sofa, that way my hands wouldn't reach her.

She never said anything directly. But, I regret doing it so much. I wish I could do something to stop my younger self from groping her.

I am not a groper, never want to be one.