his cum on my wife's face

It's been a really long time since I've posted. I had posted about my desire to watch my wife have sex. We came so close to going through with it. She actually gave her ex b/f a handjob but it didn't go any further until last night. She and I went outta town to see her sister, we got there on Wednesday. I had brought up that I wanted her to get a big cock during sex. She did the usual and played along saying she wanted a bigger cock. After I cummed we were laying in bed watching a movie and she just said out of the blue.."I really do want a big dick"...we had a lengthy discussion about it. She said "this is our perfect opportunity, no one here knows us" . I just figured she was trying to arouse me or teasing me. We had concerts tickets with her sister and her fiancée, it was close to 5 in the evening when we got a text from her sister saying they couldn't go because they both have to work. I was upset but my wife was very enthused acting...I asked what was up and she said "this is our chance baby!" We talked about it, she said she wasn't comfortable with me watching yet but I agreed that if an opportunity presented itself she could test the waters and start out with giving a blowjob. Once we were at the concert she began to drink and get very frisky. She was flirting with every guy she saw. She looked at me a little while later and said "I'm going to get another beer"... I said "hold on I'll go with you" she winked and said "I'll be alright, just wait here"... she was gone forever I was getting worried so I sent her a text..she replied "I'm fine, don't worry" she showed back up about 35 minutes later. I saw cum on her chin, lips ands cheek! I was like "did you do it?" She smiled and said "yes"...I was hard immediately! It was so hot, her face was covered! I asked her "who was he?" She replied "I don't have a freaking clue" I was so aroused we left the concert and went straight to the hotel!