Filling the Home

I'm Ronald 24 up to 4 years ago only child of Susanne 39, I always lived with my mother and grandparents Ronald and Helen. My grandparents passed away in the forest fires of 5 years ago, they were caught on the road in their car when the fire engulfed their car. That left me and Susanne alone, as my father had cleared out long before I was born. We're fairly well due to the family estate left by my grandparents. Living in a fairly remote area of the state, Susanne is a quiet person and very trusting by nature. So I had to take charge of everything since our loss of Ronald and Helen. We still drove into the closest town once a fortnight and got our supplies and anything else we wanted. Also, Susanne would get her hair done and buy clothes if she needed anything. I wasn't ever a great student and am content to work on the family property and now that my grandfather Ronald is gone I have a lot more to do. We don't employ help anymore since a hired hand got Susanne pregnant at 15 and disappeared shortly afterward. Then on a very wet weekend, I was bored and watching Susanne working around the house. I got horny and made a pass at her and I succeed in fucking her for the first time, not taking any precautions she got pregnant. It was then that I found out that my grandfather Ronald had regularly been fucking her up to his death, but he always took precautions. I didn't care that she got pregnant and started to sleep with her every night since. We now have a boy Roland and a girl Helen. I also have a girlfriend Heather 22, who I'm intending to marry next year.