Is one transgressing the issur Aishes ish if the has relations derech eivorim? I understand its frowned upon, im only asking if has status of being boiyel Aishes ish?
“Frowned upon”!? It is yehoreg val ya’avor! One is obligated to give up his life, and allow himself to be killed, if forced to do something like that. That is like calling manslaughter frowned upon because it isn’t murder. Any giluy arayos that involves an issur d’orayso is yeharog v’al ya’avor. If someone does such actions with an eishes ish it is included in the issur d’orayso of arayos.
Rambam Hilchos Isuurei Biah 21-1, Shulchan Aruch E:H 20-1, Rema Y:D 157-1.