What is it called when spouse calls, But always denying everything

what is it when your spouse is being very secretive, multiple phone lines, calling different phone numbers, on phone maybe 12 - 30 sec. But always denying everything. Some numbers are local. When I call them it has a fake business like Verizon help desk, I don't know if they are doing VM or what..been married 34 wyears and now separated. Swears they are not cheating . Gets on this site from Russia called 1c connect. Anyone?