Odd question

OK. There is someone on the internet who I used to chat with as strictly friends who we will call Bob. Well, the guy’s friend told my STBX that Bob was madly in love with me and all kinds of other BS. Bob is not even a US citizen. Now my husband is trying to pull Bob in to this mess under the UMCJ. The Canadian Army does not follow this. Now, my question is, isn’t this all considered hearsay? He can not possibly say adultry in this case can he? I never talk to Bob anymore and he was never in love with me. We talked about alot of things that was going on at the time but that what friends do. Nothing more than that.