Helping my Sister

Short story my younger sister 20 was going to college and doing exceptional at her studies. Seen as a nerdette, had no boyfriend or any close male friends. Still a virgin and not likely to lose it anytime soon. She felt awkward around boys due to her lack romantic relationships. I'm her oldest of 2 brothers and I'm an electrician 25 by trade, our other brother 23 is in the marines. Anyway, my sister asked me to help her relax around boys better. I live in my own place, unattached at the time my last relationship ended just before Christmas, due to me working too much her stated reason. Not in any hurry to start another relationship I was spending my spare doing up my house, I bought it as a fix upper. So, my sister asked what she could do to become more appealing to the boys. My first response was to find better boys, but finally said you need to relax around them and take things easy. Easier said than done, anyway with our parents away, she was staying with me till they got back, their suggestion. My sister doesn't show much skin covered head to toe in loose fitting clothing. I told her to wear more clinging clothing to show off your figure at least, if not some skin. She was quite reluctant and nervous at first, but I talked her into joining me in my hot tub. I use it to relax and ease strained muscles and enjoy with girlfriends when I'd one. My sister wore her one-piece swimsuit; she has a nice figure. But nervous even with me in just my shorts, but she said she was most afraid of boys wanting to intermit with her and nothing knowing how to respond. I said there is only one way to learn that was by actually doing it. After time she asked me to teach her, and I agreed. But not really knowing what I should actually do. Getting out of the hot tub, I was going to have shower. Being a smartass, I decided to just tease her a bit and asked her to shower with me, not expecting her to agree. She didn't respond and I thought I would just go and shower, my sister was thinking it over and as I walked away decided to agree. I was quite shocked at first but saw it as a big step forward for her. So, I couldn't back out as it might hurt her feelings or make her think even her brother didn't want to see her naked either. Weird I know but strange things go thru your mind when you have to deal unexpected things. Showering with her was okay nothing too sexual. Other washing her body and she mine, I noticed she had a thick bush and said she should shave it off. Once removed you'll be more sensual with a boy when you get that far in a relationship I said. I myself like clean shaven women, my sister thought it over and asked me to shave it off for her. So, still naked we went to my bedroom she laid on my bed. I clipped her bush back as far as I could then shaved her pussy. Quite happy with my actions, I ran my finger along her slit and played bit with it. She started moaning and I decided to go further and finally went down on her. I got her to climax, and I was now very aroused myself and so I fucked her, and I just remembered to pull out before coming myself. I was expecting her to be upset as I'd fuck her without asking first. She wasn't she was quite happy, firstly at not being a virgin anymore and secondly said she really enjoyed it. We fucked again a couple of time before our parents got back. One unforeseen outcome was my sister, focused on me as her lover, not thinking of any other males. She started visiting me mainly on weekend and was quite willing to fuck me every visit. Out hot tub use was always totally naked thereafter. I must say I'm quite enjoying fucking my sister, but don't expect it to last as she is getting more outgoing, and I expect she will find a boyfriend sooner or later.