He's been waiting for a beautiful day like this to get outside and do some upgrades to his bike. His daughter saw him and wanted to come out and see what he was up to. She's always wanted to ride on his motorcycle, but ever since he bought it, he's been working on it.
She walks out to ask her daddy to show her the bike. He lets her sit on it, but warns her never to go on it alone. He walks inside and of course, she climbs on. She pretends to be racing it and it makes him laugh. He couldn't punish her. Instead, he takes her on a ride.
After the ride, he notices how sexy she looked on the bike and decides to show her what other fun can be had on a bike. Afterwards they cool off by taking a swim in the pond. The day continues and so does their lurid sex.