My husband’s secret….

So, my husband and I have been together for 8 years, maybe about a year in he tells me he told my mom something but wouldn’t tell me. Then one day, years later he told me that he had a secret but felt like it might be a dealbreaker. He refuses to tell me. Til this day I still think about what it could be. I feel like whatever secret he has with my mom and this other secret are actually the same. My theory is that he sold me mom crack/drugs while we’ve been together. I feel like maybe he told her that he still sells drugs and then sold her some. He has a pat but since we’ve been together he hasn’t been in any trouble or done anything illegal….that I know of. I asked my mom years ago but she pretended not to remember but my mom does lie and she doesn’t talk about her addiction with us. About a year or so ago he decided that say that he doesn’t remember the secret which is BS. I’m not bringing it up to him anymore but I’d like to know how other people feel about it. Let’s say that his secret is that he sold drugs to my addict mother….how would you feel about it? Also feel free to chime in about how he deliberately told me he had a secret that he refuses to tell me.

Thanks.