What would be going on in your mind in this moment? Read story below

Your husband and yourself wanted to spice it up some. You guys agreed on having a guy come and have sex with you while your husband watches. You guys pick the male and set the night of fun up. You and this man go two rounds. You said you need a break and go downstairs to get a glass of water. When you come back up you see your husband and the guy having sex! What would you do? Your husband has never said he was gay or bisexual so you are in shock. What would you do?