Saw mom doing it

I’m a 23 years old guy from India and my mom is 47. Two days back as I was preparing to go to sleep I went past mom’s room and her door was slightly open and kinda moaning sounds were coming from inside. Since I never thought about my mom sexually I sneaked to look into what she’s upto. The scene that I saw literally struck me like a thunderstrike. She was lying on bed with her nighty( night robe) above her boobs. She was using a dildo in her pussy and with other hand she had inserted two fingers in her asshole. I could’nt recover myself from that for five long minutes after which I ran to my room without believing what I just saw. Felling guilt, remorse and ashamed :(