Not long after we started staying home my mom started asking me to mix her drinks. Yesterday afternoon when she asked me I took her glass and said, sure mom, do you want it made with love? Of course she said yes. I took her glass to the other side of the bar, opened my pants and looked at her while I masturbated. There was a lot of cum in it. I put the grapefruit and vodka in it. I noticed the big glob floating on top. It was so obvious. I was hard by the time I got it to her. I had to get off again watching her drink it. i saved it in a glass and put her next drink in it.