A Nice Surprise

My daughter and her husband came to stay with us while their house was being remodeled. I thought nothing of it and loved that they were there. I work from home, but my wife works part-time a few days a week. It was the first morning she was gone when I found my son-in-law standing in the kitchen making coffee in just his underwear. He apologized and said since my wife wasn't home, he would "be comfortable" for a little while. He never even offered to go put more clothes on. He even mentioned after sitting at the table, that while home, he usually wears just underwear or nothing at all. I didn't say much. Just kind of shrugged it off. At least he was gracious enough not to parade around in front of his mother-in-law. I joined him at the table and we chatted about nothing really. But, being a closeted bi-man, I admit that I was admiring his near,y naked body. He was in great shape. He stood to get more coffee and my eyes were drawn to how well he filled out those boxer shorts. His cock swung freely beneath the cloth, occasionally letting me catch a glimpse of his head pressed against the fabric. I tried to make sure he didn't see me looking. He leaned with his back against the counter, though, almost tempting me to ogle him. He took a drink and raised on foot to put against the cabinet and, with a wry smile, he casually let his other hand hike up the leg of his boxers and let his cock and balls slip free. I looked. I didn't hide that i was looking and he obviously wanted me to look. I let out a little nervous chuckle and stood and told him I to get started for the day. I took my coffee and left the kitchen. I closed the door to my office and pulled out my own cock and came within minutes.
We never did anything, and I never admitted to him that I wanted to fuck him so bad! I did see him in his underwear several more times and twice completely naked. I'm hoping they come and visit again soon.