Ewww! Is this bad of my parents?

My mother & father, who I love very very much, well, I just found something in their room while looking for something.. a box.. so I opened it, and I found this nasty lubricant, some weird lingerie and things. I thought they didn't know they did this stuff.. I need to calm myself down and I know I'm being silly.. but they're very christian and I'm scared they're sinning or something. I wish I could undo what I saw in that box!