After 15 years of marriage I discovered that my husband is

After 15 years of marriage I discovered that my husband is gay, I had some suspects in the past, but i've never thought about them seriously, till recently when i saw him in the living room with some hairy middle eastern man and he was sucking that man's organ while that man was calling him some filthy words, like: you pussy, ya fuck, you bitch ..etc etc .. i was shocked and i couldn't open the subject with him till today