My reunion with my sister

Quick history, our parents divorced and split their children each taking one with them. They had a very hostile relationship after the divorce, so their couldn't see or even contact each other. I'm James 30 the older of the siblings and only when my father passed away in late 2020 did I get the ability to track down my mother and sister Fiona 28, I had been working for my father business and on his death I got information on mother and sister. That enabled me to start a search to find them, everything seemed slow due to the ongoing pandemic. Finally traced them and found out my mother was in hospital in a bad way (cancer). So I went to visit her as soon as I could, but arrived the day after she passed away, finding a distressed Fiona who was happy to see me. But very sad about our mother's death, I didn't tell her at first that our father was also gone. I waited until she asked of him and then gave the news of his death. She took it fairly well and we became really close. I already had an offer to buy my father's business and decided to accept and also sell his home as well. Fiona was like me the only one mention in our mother's will and I was the only one in my father's will. Fiona also decided to sell up everything and we moved to another state to start a new life together. We bought a house together and stayed close and being close all the time led to kissing and then sex. The years before the divorce we had been very close due our parents fighting almost all the time. That closeness never waned and once we fucked it became our new normal and led to Fiona having our daughter last month. She is very healthy and Fiona wears our late mother's wedding rings and nobody knows we're siblings.