I would like to tell you about my masturbation sessions with my 21 year old twin daughters, Melissa and Deborah. It started when they fell in love with one another. They had always been close, but I noticed that they were becoming virtually inseparable. Having spent about half my own teenage years falling in love with other girls (the other half was spent falling in love with boys) I recognised all the symptoms of a teenage crush. Melissa and Deborah would spend hours gazing into each others eyes, sighing, hugging and touching one another and (especially when they thought I wasn't looking) exchanging kisses and caresses. I was not at all surprised or worried by this development, having heard that it is quite common for same-sex twins, especially identical twins, to go through a period of mutual sexual attraction and experimentation. What did surprise me was my own reaction. I found myself becoming highly aroused by the thought that my two girls might be sexually involved with one another, and for the first time I started to have fantasies about them while masturbating. Things came to a head one summer night. My husband was away on business, and I was sleeping by myself. As always in hot weather, I was sleeping in only my panties. I was woken very early by a vividly erotic dream about making love to the girls and had to masturbate to orgasm. After I had made myself come, I needed to urinate and got up to use the bathroom. On my way back, I heard a sound while passing by Melissa and Deborahs bedroom. I looked up and saw that their door was ajar. I peeped inside and saw that they were sitting naked on the bed together locked in a tender embrace and exchanging passionate kisses. I immediately became aroused at the sight and could not stop myself watching. Lost in their reverie of love, the girls were quite unaware of my presence, and I was able to observe them for some time. I was so turned on that I began to caress myself through my panties. Now for some reason I often find that sexual arousal makes me want to sneeze, and as I watched the girls I suddenly felt a tickle in my nose and- Atishoo! Atishoo!- I gave two powerful sneezes. Melissa and Deborah looked up in shock, suddenly aware that I had been watching them. I felt that we needed to talk, and entered their room. At first they seemed afraid that I would be angry with them, but I hastened to reassure them that I was anything but. I sat on the bed next to them for a mum and daughter chat about all things sexual. I explained to them that it was natural for girls of their age to have feelings for their own sex and to experiment together. I told them about my own bisexuality and that in my own teenage years I had had a relationship with my own sister. Talking about sex with my two gorgeous naked girls was making all three of us very horny, and Melissa and Deborah both also sneezed a couple of times. They explained that they also experienced sexual sneezing when aroused, and had therefore realised what had made me sneeze while I was watching them. By now I was really becoming moist down below, and wanted to play with myself again. I therefore suggested to the girls that we should masturbate together, so that I could teach them some masturbation techniques, and they eagerly agreed. I slipped off my panties, opened my legs and proceeded to bring myself off in front of my daughters, which excited me no end. When I had finished it was their turn, and we spent a long time in a mutual masturbation session.