Would you be upset?

My husband and I got into a huge fight and he ended up leaving he said he was gonna hangout with his sister and her girlfriend. I asked if he was gonna be with any other girls he said no. I then looked through his texts and found out he was in fact with another girl that was their friend and they all went to red lobster. & im upset because I literally asked him if he was with soemone else and he lied to my face and said he lied because he knew I would be upset. Would you guys be upset? Would you count that as a double date?