At 16 and a few days, I got my moped licence and I was mobile and free. I was of course still at home with my parents and older sister. I had stashed a couple of pairs of her panties that I wore when ever I could. Summer 77, saw me undertake a long bike ride to my aunties farm for the summer hols – previously I’d only been able to stay for a couple of weeks with parents. So there is me, staying on the farm with my cousin Leila (adopted) having to put up with this pesky cousin all summer. Within the first week, I discovered that there was a washing basket in the bathroom. Lee (and everyone else) put their worn clothes in there at the end of the day if they were for washing. I had just found me a new source of girly panties. I worked out that if I went to the loo after she had gone to bed, I could take her panties to bed with me, and replace them in the wash bin the following morning. It was a habit every night. One evening, as I was doing the same thing as I had been for a couple of weeks, I found a gorgeous pair of red satin panties – she must have enjoyed wearing these, and so was I going to – off to my bed for a wank – I put them on as I always did, and after a quick pose in the mirror I got under the covers. 5 mins later Leila comes marching into my room – demanding to know where her knickers were. I’d been set up. She was 2 years older than me, and I was always slightly scared of her. She again demanded to know where they were, then threatened to tell on me if I didn’t own up. I was obviously bright red embarassed, but my hard cock refused to go down. I tried to take them off under the covers, but she grabbed the covers and pulled them back. “I thought you were wearing them – and wanking too I’ll bet”. I rolled over quickly to hide my cock. Then the real shock – she told me to carry on while she watched. She sat on the edge of the bed and just looked at me – “I’m not going until you do, so you’d better get on with it”. I wanked my cock, the first time I had been this close to anyone as far as any sort of sex was concerned. She just watched, nothing else, and it didn’t take me long to cum into my hand, and all over the pretty red panties. She then said “give them back to me”. I pulled them off covered in my cum, and gave them back – she left the room in silence. For the next few days I wasn’t taking any panties from the was bin, and good as her word she didn’t mention a thing. Then about 5 days later as I folded the covers back to get into bed, there was the pair of red panties, all clean, and just laid there. I was very confused, scared, and intrigued. I didn’t put them on – just hugged them to me and thought about that night, and immediately got hard. I heard the door move – heart in my mouth – she came in and sat on the bed again. “Do it again” she said. And pulled the covers off me. I was naked this time, just cuddling her knickers - “put them on” she instructed. This became a routine then for a few days roughly every other day. One day I got bold – after all I had a hold over her now too, and said I wanted to see her in her knickers just like I was. I was most gratified that she slipped her top layer off, and treated me to my first close up view of a girl in her bra and panties. Next time she came in she brought a bra with her, and said I should dress just like her, bra and panties. She made me walk around the bedroom like it. It was still always just me wanking and her watching. Couple of weeks later we found ourselves home alone for the day. At breakfast she whispered to me to come upstairs after they had all gone. Laid on her bed was a selection of her clothes – she gave me a bra and panties, then found a top and skirt that fitted me. And we went for walk across the fields. My first outdoor experience dressed as a girl. Laid in the fields that day she kissed me – as a girl to a girl. She played under my skirt, and I gained my first experience of getting my fingers into a girls panties. That summer Leila was my first, first naked girl, first tits, first pussy, first fuck, first mistress (though I didn’t know it at the time). She called me Tina, as its very close to my boy name. We are still close 40+ years later. She has a sub husband.