I feel so betrayed right now

Last weekend my husband went to a friends birthday party. Little did I know, the person who threw the party for his friend also hired 2 strippers to come give the guys lap dances. I asked him the morning after the party what they did & if they had fun. He yeah it was fun & we just "drank beer, joked, listened to music" I found out later by the birthday boys sister that she was the one who hired the strippers. She told me that her brother told her that all the guys got lap dances by the two women, including my husband. They also each gave them $20 tips. I am embarassed, angry, and livid after hearing the real story simply because I asked him & he played me off like nothing happened. I really wanted to cry in front of her but I didn't want her to see me breakdown. Not only that, but she said his future brother law was there but left before the girls started their lap dances which means he had enough respect for his fiancee to leave but my husband didn't even have enough respect for me to leave & we're already married! We've been married for almost year, together for almost 3 years & this is the first time I've truly felt betrayed by him. I honestly don't even want to be in the same house as him right now. What do I do?