Fun at University

I'm not people person and prefer to study than party, on getting to university I studied instead of partying. I'm Karl now 32 and have 2 children with my sister Lauren 30, I was fairly lonely at university till Lauren came to study there as well. I lived in a cottage owed by the family near the university and on Lauren arrival she moved in with me. She also didn't party and we kept to ourselves mostly except when in class. At first it was like being at home together, but at the start of her second year. We became more closely attached, not sexually at first. Our mother had passed away 6 years earlier and shortly after starting the new term our father died in an car accident. With no living grandparents or close relatives it was just me and Lauren. So we stayed close as much as possible, we decided to sell the family home and base ourselves in the cottage. So during breaks from the university we stay put and kept close. During one such break we had a little party to celebrate Lauren birthday and had a few drinks and got a little drunk and we slept together. Lauren lost her virginity as did I. Of course she wasn't on any protection, but didn't get pregnant. With the taboo broken we started sleeping together using condoms and having regular sex. On my graduation we had a few more drinks in celebration and the condom broken during our sexual relations afterwards. This time Lauren got pregnant and so after every test showing no problems, she started wearing our late mother's wedding rings. I got a good job locally and we continued as before on the birth of our son. We carried on as before and then Lauren graduated and I had already got a transfer interstate and Lauren also got a job close by my new job and we sold the cottage and moved interstate buying house for our family. Lauren got pregnant soon after arriving and all test showed no problems again. Lauren was able to work from and go in to twice a week so no major problems with job. After the birth of our daughter she started taking precautions as we agreed 2 children is enough. We're very happy together and live as man and wife and have two healthy children.