Finally, she sucked a load of cum out of me and we snuggled down to sleep. I felt her mouth get me hard and off during the night. I used my fingers to... give her pleasure in return.In the morning I asked Clara why she didn’t have intercourse anymore. She said it had become painful and her doctor wasn’t any help. I’d noticed that I couldn’t stick my tongue very far into her vagina. I had an idea I wanted to try later.Courtney had obviously had a good time too and winked at me. We didn’t have much. It's obvious from the expressions on their faces that they got an eyeful when I stood up. My eyes were drawn to them and despite my resolve to keep on walking I stopped at their table.I can't do it. I know I can't do it. But as they looked at me curiously I found myself reaching down and slowly lifting my skirt. That may sound easier than it actually was. I'm so embarrassed that my chest hurts! I can't breathe. It feels as though all the oxygen has been sucked from the room. As though they have. She sat forward."Donna, that was a tough test, but could you pass the same?" What do you mean?" I stood before her."Look up at me. Right in the eyes." OK" Keep looking." I unbuckled my belt. Opened the button on my pants. "Eyes up here." What are you doing?" Hmm, I guess you're not cheating." I began slowly unzipping my pants. Then I let them fall. "Very good. Now the last test."I hooked my thumbs into my boxers. Slid them down. My hard 6 inch cock now pointed at Donna's face."You may look.". “Why don’t you try knocking every time rather than trying to catch me?”“Would you show me your dick?”“It’s not going to be that easy. You need to work on the sincerity part of it.”Over the next week, she started knocking, Praise the Lord, and was getting better.Saturday night it was bedtime and I heard a knock on the door I told her to come in.Without saying anything she sat on the foot of my bed and pulled her pajama top off exposing her breasts, ‘Mark, I’m horny!’I threw back the covers.