Mom made me horny

One day I was studying, suddenly mom came to my room with cream in her hand and she told me that she got a pimple on her ass and asked me to put cream. She opened her joggers/lower and pulled down her panty but facing back so that I don't do anything ********. I was really excited, I got so much sexual feeling, but I applied that cream. She then asked me to check if there is a nail scratch near her ass hole I touched her ass. I was so happy.