Sociopathy is a common symptomo f the addiction... people who are serious addicts become users.. they will use whatever and whomever they can to support their infidelity etc...

You sound like yo have the hang of it... state your position and hang up.. that's the best way to handle it...

Keep exposing so everyone konws you are being a mature adult.. don't hide at all.. keep your face out there to combat her damage control efforts...

The more they see you calm and mature the less they are gonig to buy of her lies