Sister Touched My Dick

Few days ago I injured my leg. It was pretty bad and I was bed ridden. During this time my older sister would massage my leg which was very helpful and she is really good at it.

I was taking painkillers and it put me to sleep everytime. I remember getting massage from my sister and falling asleep. It was just the 2 of us in the house. I woke up few hours later with a massive hard-on in my shorts. I was worried that my sister had seen it and how embarrassing that would be. But when my sister brought dinner for me she was acting perfectly normal or atleast that's what I thought. Within few minutes I noticed her eyes checking out my dick area a lot.

After dinner she came back to my room to chat. She was wearing loose tank top without bra and tight shorts. I should also mention that my sister has not had a boyfriend since Covid lockdowns. She sat on the bed next to me, her breast rubbing into my arm and her hand on my injured leg. She asked me if her massages were helping me. I told her that they were and my pain was almost gone. She said she would massage me one more time before going to the bed. She asked if I wanted painkillers to help me sleep but I said that's not necessary anymore. She started her massage on my injured leg. I was only wearing a t shirt and grey sweatpants without underwear. Firstly she stick to the injured part of my leg as we were still chatting but as I started to feel more sleepy I noticed her hand moving upward towards my thigh. I felt her fingers slightly touching my balls as her hand moved. I stayed still pretending to be asleep but I could feel my dick getting bigger. She must have noticed too as I could hear her breathing getting heavier. Suddenly she started massaging my lower stomach area just above my dick which increased the blood flow to my dick making it even bigger. Her hands were now focusing primarily on my crotch without touching my dick directly. I opened my eyes slightly and saw her staring hungrily at my dick while biting her lips. My dick at this point was fully hard at 7 inches and I'm sure it looked very tempting in those grey sweatpants for my sister. And then she finally did it. She grabbed my whole dick in her hand, squeezing it slightly and rubbing the tip. I felt her other hand getting between my legs and grabbing my balls in her palm. She also gave them a little squeeze and scratched with her fingernails which made me moan loudly. That must have broke the spell because she left quickly after that. Few minutes later as I was going to the bathroom to finish jerking off I heard muffled moaning and sound of a vibrator from my sister's room.

Next morning she was acting overly friendly with me. She was very touchy with me and was making jokes about giving me a proper full body massage. Since then I've noticed her showing herself off in front of me by bending over constantly, bumping into me especially her ass into my crotch. She has also stopped wearing a bra because I can see her nipples poking through her tank tops all day.

I'm not sure what to do. Should I let things happen or stop. I know this is wrong but I really want to see how it feels to take things even further.