Now I am used to having the house to myself during the day and Jeff is at work unless he gets called out in an emergency so I get to satisfy my sex cr...avings any time I choose, with my father here and only me to entertain him this all changed, I didn’t feel like I could run off to the bedroom and play without it being obvious, and to make matters worse Jeff was on an emergency call out and working till late into the nights not getting home till around midnight so no sex and after 3 days I was. I was getting close and you could tell and stopped. The guy wondered off into the crowd of people and as he did you got up and walked over to a couple sitting at a table just in front of us. My wife walked up to the man and leaned in and kissed him as his wife watched. As you broke your kiss with him you turned to her and I watched as her tongue and your tongue met in the middle. It was like in slow motion as your tongues touched and twisted around each others. This sent a shockwave of passion. I lose myself in that instance, all I want is to keep going, so we go for a few minutes longer. I again have a clear thought, I tell Sara again, we must stop. Sara pouts and tells me she doesn't want to stop, she says she's ready to make love with me, her brother. I tell her it's what I want too, but if we go down this road now that it'll change things and we can never go back. I get her answer almost instantly, as she grabs me and starts kissing me with such passion. I give in to her lust and. I set off back up the field with Mary holding the dash with one hand and the back of my seat with the other. I keep looking backwards with her tits only inches away from my face juggling up and down with the bumps of the field.Once to the end of the row I got out of the tractor to give Mary some room to get back out as the tractor only had one door. I stood watching as Mary came out backwards and that was when I saw her white knickers going between her chubby legs. Mary seemed to linger in that.