Job Status Upgraded

I (28) work for a mother 49 and two sisters 28 and 24, none of us are anything special in looks. But I'm really fit work out at a gym where I work as an assistant trainer part-time. But my main job was working for the women, it paid my bills, the gym job gave me spending money. Anyway, I was shifting boxes in the back of store and some chemical spill onto my shirt. It started to burn my skin and so I removed the shirt and washed my chest where the chemical had touched my skin. It wasn't a serious burn some medicated cream ended the burning feeling which was like a mild sunburn. No permanent harm done next day my skin had recovered, still red but it didn't cause me any discomfort. The mother had seen the accident and had assisted me cleaning off the chemical and had applied the cream. But she had seen I was built as they say I was quite muscled. She liked muscled men; she hadn't taken too much notice of me before the accident. But seeing me without my shirt changed that, had me stay back after work one day the following week and straight asked me to fuck her. I do date and score sometimes, but not enough to pass up an offer of sex. So, I started fucking on regular basis, but secrets don't last inside families. As other notice any changes. Which led to us being caught by her daughters, with me up to my nuts inside the mother. After shock of getting caught had passed, the daughters weren't upset or angry, they just wanted their share as they termed it. The simplest solution is usually the best. In return for free room and board at their home I would fuck all three and could still whenever I wanted too. Worked well for about six months. Either she missed taking her contraception or it was faulty, I don't know. But the youngest daughter got pregnant, the other daughter decided she wanted to have a baby also. So, now 7years later I'm not married to either, but part of the family and still fucking all three with 5 children, two with the youngest daughter and three with the oldest including a set of twins. No plans on having anymore. Don't date anymore, I rarely did even before I got the youngest pregnant, no real need sex was readily available at home, so why go on a date.