Start of my new life in the Country

I'm Andrew now 20 live my aunt Kate 43 and her 2 daughters Rachel and Emma (twins) 22. Five years ago last June I went to live with and family as my father died and Kate was my only living relative. My mother had died 8 years earlier, uncle Keith had passed away 3 years before my father. I wasn't great at school and doing a trade would be the best I could hope for. I arrived at Kate's dairy farm 530 acres and felt like out of place, but Kate was nice and kind and gave me time to settle in. I did trade courses at school and worked after school at a garage. I left school the next year and trained to be a mechanic and I would help a local builder in my spare time and learnt carpentry and plumbing and some electrical skills. I also help Kate on the farm and when I was 18 I was caught facking Emma by Kate. I thought I would be sent away, but Kate just laughed and let us finish. Then Rachel wanted me to fuck her and I did, then one night just after midnight Kate got into my bed and wanted sex. That was the start of my sleeping in Kate's bed and having regular sex with the 3 of them. Emma got pregnant and Rachel soon followed, Kate got pregnant also a month or so later. We kept it in the family so to speak, Emma is due in October and Rachel in November and Kate in early January.