Wife Surprised by switch

I have always expressed to my wife how much I wanted to see another man touching her and his cock inside her. The answer was always we will see. One night I had a friend come over and hide in the closet before my wife arrived home from work. After some small talk she wanted to have sex. My wife always enjoys me giving her oral sex. The lights were almost out and my wife likes to cover her head so she can concentrate. I started sucking on her clit and enjoying myself and after a while my friend came beside me and I moved out of the way and let him take over. She said something was different but she liked it. I moved around the bed behind her and took her arms. She was startled and tried to figure out what was going on. Once she figured out it was another man between her legs she started to struggle. I held her arms and it didn't take much before my fried was in position and slid his cock inside her. She struggled to get free but she couldn't break the grasp of my hand. I held her tight and watched as my friends cock slid in and out of her pussy. I couldn't believe that I was watching another mans cock inside my wife but the thrill was getting more exciting. My wife still tried to break free but as he came he filed her pussy and pushed deep. She couldn't believe another mans cum was dripping out of her. Before she could recover I slid inside and my friend held her down while I pumped her hard. It didn't take long before I climaxed because of the excitement. The amount of cum was running out of her. I thanked my friend as he cleaned himself and dressed. My wife was upset but later expressed it did make her cum and would like to try it again.