100%! Some of the pictures they showed from their time in Miami were definitely lifestyle (aka swinger) theme costumes. (Swingers love themed parties!). Plus there is a very large scene down there. If they aren't swingers, they are "dirty vanillas".
Actually, she's the one who wanted to move. She even said it in the episode, but there's an interview somewhere that she talked about wanting to move and raise her boys away from the OC pressure. If you follow their social media, they seem very happy there and do a lot together as a family and as a couple. She's also working in an ER. I think they've both grown up a lot.