My In-laws Think I'm A Pervert

Been married to my wife for 9 years and her family, out of nowhere a few years ago, turned on me and I just found out my wife is to blame. My wife seems innocent but has a wild freak side. She's into dressing slutty and wearing no underwear on dates, filming our sexcapades, going to strip clubs, among other things. It 2018 or 2019 and we had left a party and had my wife's cousin with us. They were both dressed super slutty that night, hanging on me all night, tits and ass routinely making its way out of their clothes. I had copped a feel of her cousin many times that night, mostly at my wife's request. We get back to our apartment and her cousin passed out on our bed with her skirt up around her waist and her bare pussy and ass in plain view. My wife was teasing me by spreading her cousins ass, rubbing down her ass crack and over her pussy telling me she knows I want to fuck her. My wife and I end up fucking right next to her cousin. I came on my wife's pussy and stomach and she rubbed her hand in it then in her cousins ass crack again.

So, her cousin never has acted any different towards me, but spread to some close family that she think I took advantage of her when she was passed out because she woke up with dried cum in her ass and her skirt pulled up. My wife refuses to clear things up saying how embarrassing that'd be and to just ignore it, it'll blow over. I'm thinking of clearing things up myself, as I still routinely speak to her cousin. But I know if it gets out and embarrasses my wife she will be pissed. On the other hand, if I tell the truth and my wife doesn't corroborate the story it may make me look even worse.