Noun, な adjective, and の adjective
ふりん
どうやら妻が不倫をしているようなんです。
It seems that my wife is committing adultery.
If you do not have any ethics you'll probably do something crappy, like commit adultery. Usually only unethical people would cheat on their spouse, right?
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.