Teacher asked the class to see as to how the nipples had all grown so stiff. She told the class that when the nipples grow stiff that meant the girl h...s become excited and when she gets excited--her pussy becomes wet. Some of the boys and girls wanted to see as to how the pussy was getting wet. The teacher called some girl volunteer to assist her and Reena came forward. She was called in front of the class and teacher told her to expose my pussy. Reena was not shy and immediately she lifted my. So I accepted the invitation.My mother seamed quite pleased at the fact I had been invited out , asking me what I planned to wear, to enjoy myself , etc. I wasn’t really sure what to wear to be honest . My mother had me at quite a young age so at 35 she was very fashionable still and loved getting involved . We visited the designers store again , she was busily telling them I was going on my first date and she was so exited , far more than I was. I was asked what style I wanted , I told them. Come here, I said pulling her towards me. No she said, you’re drunk, go to bed. She tried to pull away but I pinned her to the wall and went in to kiss her. She turned her head and I kissed her cheek then starting kissing down to her neck. "What are you doing, its late, you should go to bed". Why don’t you come with me" I whispered. "I meant alone" she added. I heard her exhale as I ran my hand up her thigh around to grasp her ass then up to her big tits. I was moving it back down to her crotch. ..you know...your semen. We'll have a chat after dinner. We probably won't be able to start properly getting your samples until tomorrow, so if you need to relieve yourself when you get home you can do, but we might do one test run tonight, so save yourself for a time with me when I will be present when...you know...you masturbate."I'd never heard mom talk like that before and my cock stirred. I was semi hard when we got home and had to cover the front of my pants with my jacket until I got.