Shoulder massages

My first wife and I had 4 kids and needed a babysitter. Dawn was great with the kids and had a boyfriend , Kevin. The 4 of us got along great and played a lot of Euchre usually Dawn and I partnering and Sonja and Kevin partnering. Depending on how much Wildberry cooler was imbibed Dawn used to playfully provoke Sonja into impromptu wrestling matches in which she would usually twist Sonja's arms mercilessly forsing her to say I GIVE or MERCY. As you can imagine this was a thrill for Kevin and I to witness.
Kevin clearly had a thing for Sonja despite their age difference and I sensed Sonja really liked Kevin as well. When I suggested that I wouldn't be averse to them getting closer Sonja was aghast and acted shocked I would bring that up. I then told Kevin that after he dropped Dawn home he should come back and massage Sonja's aching shoulders to make up for Dawn's playfulness.
Kevin was back within the hour and, aided by some Coors Sonja allowed him to massage her shoulders as I beat a hasty retreat to bed. Needless to say this wasn't the only time Kevin came by without Dawn's knowledge