Retreat to the Bunker

My late father Richard who died early year was a prepper for forty or so years of his life. Our mother passed away in 2013 from cancer. The bunker is buried on 37 acres property, which to anyone passing it looks empty, except for an old barn. On the highway side of the barn there's nothing to see and on the other side it has solar panels. They provide the power for the bunker, since the start of the coronavirus outbreak. Both me and my sister Gwen 23 single went straight to the bunker for safety. I'm Richard junior 26 single and now unemployed like Gwen. So we grabbed as much stuff as we could and bugged out to the bunker. It was already well stocked with tin and dry foods and had a good safe water supply. On arrival we parked our cars in the barn out of sight and entered the bunker. We could keep up to date with what was happening and kept our trips outside to a minimum. After a week we both were bored and horny and started masturbating ourselves, when alone. But this soon became unsatisfying after a while also. I straight asked Gwen would like to fuck and she answered okay and so we started fucking. But we had only one box of condoms and it was empty after4 a week. Gwen is on the Pill and so we have kept fucking and have also decided to keep fucking when her supply of the Pill runs our shortly. As we have the same surname we will if required act as a married couple if Gwen gets pregnant. I expect we will have about another month or so in bunker. I've told Gwen if she wants we could try anal intercourse after she runs out of the pill, but she said no way and so unless the virus is controlled or a protection to it is found. We're staying put and fucking everyday.