My mom was making out with another guy! HELP!!!?

I am a guy (16). My mom is like 36. Lately my mom has been flashing off a lot of and stopped wearing bras (you could tell by looking at her) and has been getting quiet ual with my dad. The other night we were watching TV and they started making out! I never saw them kiss before! It was a little weird 'cause I always thought of the couples who aren't that into the lovey-dovey business. So it was a little weired. Then, one night I had to use the bathroom and it was like 1:00 AM. The light in their room was on so I peaked and they naked aggressively making out and (possibly) having . A few days later, I came home from school, my mom is supposed to be at work but I hear noises from their bedroom and I peaked and saw that my mom was making out with another guy who I know worked in the same office! My mom was topless and was wearing shorts and the guy was clothed and they were making out with tongue and everything! What should I do? I can never look at my mom the same way again!