IIRC, "EMA" is the commonly-accepted board abbreviation for "Extra-Marital Affair".
Also, i could never bring myself to just use "A" for affair. Seems like too much opportunity to read in a confusing fashion. Ditto "R" for reconciling. Took me forever to realize that Steve85 was referring to "reconciling" when he typed "Ring" as opposed to having or wearing a wedding "ring".
H53/W51, R-ing 4/'18
"Do not arouse or awaken love until it so desires"-Sg.of Sg 2:7
"So oftentimes it happens,that we live our lives in chains, & we never even know we have the key"-Eagles III 1:3