I 37M and my GF 30F aren't having sex anymore.

A little bit of back story. I dated a girl all through college and was engaged. We dated for 15 years and I was saving for a big wedding. Out of the blue, no signs, she tells me that I'm disgusting and she couldn't take the thought of having sex with me anymore, she withdrew the money I have saved from the shared account and kicked me out. I stayed on my friends couch for a month to save up the money for a new apartment. Fast forward a year. I started dating a single mother. We have been together almost 2 years. I treat the kid as my own. He never did sports, I signed him up for basketball and I teach him and take him to all his games and practices. I'm the only one who disciplines now and I really do raise him as if he was my own because I love the kid. I pay all of the bills of the house, the food etc.. I don't ask her for anything. When she wants to pay for dinner or something. I don't have a problem with it. I take her on dates continuous, I even take parents out for dinner here and there. She does whatever she wants with her money. I clean up around the house and even when she does do laundry, she does her and the child's but doesn't do mine. ( I hate doing laundry) . Now I did leave that apartment last year and moved into her house that her dad bought for her. It was rough but I already redid the kids room ( flooring, paint etc) the garage, the living room. As some form of payment for not having rent and like I said financially I pay for 98% of everything. She paid off her debts... Again though I find myself in a relationship where my partner doesn't want to have sex with me. While I was at the apartment, she touched me everyday, even if it was brief. Morning stuff etc. I was clear from the get go and told her sexually I would like to have sex 2-3 days a week and we were consistent BUT as soon as I moved into her house. It just plummeted. Now I'm the last month I have had sex 1 time and 1 HJ. This week, the kid was on spring break from elem school and when I took her and her parents out on Thursday. Her mother asked if he could stay over until Saturday night. The next night I took her out to dinner again and afterwords.. nothing. Saturday morning I asked and got a not right now. So I had some stuff to do with her car, put in a new grill and did some stuff to my car. Then I came home and that night went to bed and she stayed up. I know she isn't cheating on me. We live and work together. I give her space because I don't want to exhaust her with me being around. But Im starting to feel the same way with the lack of and asking for sex that I had with my last GF before she told me she found me disgusting. For the record, I don't think I'm disgusting. I shower several days a week. I don't when I get off at 7 and start my other job from 9 to midnight. I usually just go straight to bed because I get up at 7 to go back to the first job. I take care of myself. However it's starting to feel just as familiar as with my ex. I don't know what I can be doing wrong. Sorry for the long post.Any idea?