Will I go to hell for my past weakness??

My sister and I were curious of bodies of the other sex. We agreed to show each other in detail. She stripped first and let me look touch anything I wanted. Did not penetrate her as we agreed, but I did masturbate her clitoris. Nothing else but touching her breast as I did it.
I stripped next and she looked me over. She was amazed how hard my cock was. The size of my nuts. She did suck me for just s short moment. From there she jerked me off. We got dressed and never did this again.

She told me she prayed and God has forgiven her. I have not found that peace. I am glad we did not have sex as she offered later. I am shaken by this and have bed dreams of my punishment