My Sister Donna

I'm Paul 32 married 2 children and last year, my wife Bridget 30 went to visit her parents with the children. Soon after she left the lockdown was imposed and she was stuck staying with her parents. My sister Donna 27 was also stuck, having quit her job and was in the process of moving to another to town and finding a new job. She had a job offer before she left, but it disappeared when the lockdown started as the business closed up. Stuck without a place to stay, her last place was already gone and she hadn't found a new place because she was going find one on her arrival. As I was in between the 2 places she came to my place. So it was me and Donna and after week of lockdown I was bored and horny. One day I decided to have barbeque and ordered in beer and planned to have a nice barbeque with Donna. Who was also bored and a bit horny also, After eating our barbeque, we sat drinking the beer and drank more until we ran out of beer. We were tipsy rather than drunk, but it didn't matter as we were already home and not going anywhere either. But we started to muck about and it ended up with us in bed fucking. The next morning we ere both a little sorry from drinking too much and then fucking. But as we talked about it, we decided what the hell and started fucking again. We fucked regularly until the lockdown was over. Bridget and the children returned, I had to go away and finish some work delayed by the lockdown. Donna stayed Bridget and she joined Bridget in her bed and they also had sex together. Donna really enjoys sex and likes women and men equally. By the time I got back they were very active sexually together and my first night back, Bridget got Donna to join us in our bed. I fucked both of them and Donna soon found a job locally and Bridget want her to keep staying with us. I wasn't against and Donna decided to give a go. No problems but both Bridget and Donna protection had lapsed and both let it go a little too long. Only after both missing a period did they realize. But it was too late, after test confirmed them both as pregnant and Donna having every test there is. Did we all realize that our family was now getting bigger quicker than we had planned. Only thing that came up about the tests was with Bridget, she was having twins.