The best Deal of my life

I'm Devon 34 single and have a very good paying job, I've always been a high achiever in everything except with women and sports. A gigantic nerd according to my sister Rosalind 25 and unemployed. She lost her job due to the pandemic last year and not wanting to go home and live our parents. She asked me to let her stay with me, I couldn't refuse as she is my only sister. But we are so different, she would go out partying and I would be home studying. I passed with high marks and she just passed. The first few weeks nothing happened, she looked for a job and I did my work as was normal for me. But Rosalind couldn't find a job and she was running out of money. She didn't need money for food or accommodation and with the night clubs closed she only had basic expenses. But I told if she needed anything I would give what she needed. But with our parents starting to try and get her to return home, she wanted a job and any type would do. I keep my home clean and always have and so does Rosalind, we were raised that way. With her worrying our parents might come and take back home and the chances rising as long as she didn't have a job. Rosalind asked me to hire her as my housekeeper/assistant just so she could tell our parents she had a job. But I'm can't lie very well, if at all and Rosalind wasn't much better when it came to telling our mother Carol. Carol has the knack of finding the truth. Even on the phone she can pick up the truth or lie from us, unless we were telling her something based on some fact. Rosalind said she would make worth my while, by telling our parents that I needed her help and that was the reason I hired her. Help with what, she wasn't qualified to help me with my work and couldn't understand what I do anyway. It was the next day that Rosalind told me if I helped her with our parents she would help me with my love life. I responded what love life, she replied I will help you get a love life. I asked how can you do that, I don't date or see women at all. I will train you to be better with women and be better prepared to date a woman in the future. I repeated How, she answered I will teach you to fuck and please a woman and do that by letting you fuck me. You can't be serious I replied and she undressed in font of me and stood totally naked and said you want your first lesson now. I was shocked and didn't know what I should do, but my cock went rock hard and Rosalind saw that she had my full attention by the bulge in my pants. She took my hand led me to my bed and then totally undressed me and having me lay on my back. She started my first lesson over the follow week she slept with me every night. I started to learn what I should do and when Carol called she seemed to accept our story of Rosalind working for me and that I needed help while working from. I found my self lusting for Rosalind and she told me that I had really improved from my first time fucking her. She still live with me now and we regularly have sex. I'm have had a couple dates, no success in bedding other women yet. But Rosalind tells me I will succeed sooner or later. But she makes sure I don't rusty.