Isolated Living

I live in a remote area and bad weather cuts the only road quickly. So, we always stock up before winter or the rainy season. We do have a helicopter, but in winter the wind makes it hard to use due to high wind conditions. All outside contact is via satellite and I usually just have my dogs for company. But my sister when recently divorced no children decided to have a break from the crowds came for a visit (two weeks). But nature had other ideas, the first snowstorm of the season closed the road access. No problems as we had everything, we might need on hand. With just one exception condoms, living alone for weeks, months at a time. There's no need to stock them, so as my sister was stuck with me and our hormones got aroused. We started fucking, using the pull-out method, safe and sure when you aren't drunk. But we celebrated a little much and I failed to pull out in time. One mistake doesn't mean she'll get pregnant, but we decided to not bother anymore taking our one and only precaution but kept fucking. Now my sister lives with me fulltime along with our mother (widow) and our healthy daughter 2. Living remotely is perfect for us, and we have continued fucking. with the only change our mother joins in as well.