I love what you are attempting to do, here. I imagined my ex and I doing the same, but that all blew up in my face like fireworks on the 4th. I support your heart in trying to keep things "normal" ish for the kid's sake. It is a great sacrifice to allow him into your space. I was doing the same. Then.. he would come over when I wasn't there. He would go through my paperwork. He didn't even bother to be discreet about it. He is not who we thought he was. My children are older than yours and that is a blessing. They are all in therapy, learning to navigate the kind of relationship they will choose to build with him. Mine are girls, mostly, as well. With yours being sons, there is most definitely a difference. Many blessings on your journey. May it go as well as it can. And may you find happiness!