I got a wierd question...?

Ok so one day i was at my friends house. It was the afternoon and me and my friend were chilling out down stairs playing wii. I went up-stairs to go to the bathroom. When i go up stairs i see my friends mom (shes pretty hot btw) laying on her bed and she was using a vibrator. Im not sure if she saw me, but i doubt she did. I ran went next to tyhe door (so where she coulndnt see me) and started to to her moaning and ual noises.. Is this normal or what do u think..