I think it would be interesting to do a story well. The father goes to a certain glory hole on a regular basis to get a little relief since he doesn't really get much at home anymore. He has one of the best experiences had been there in years, maybe has more fun than he had long time.
But the person on the other side is a family member. Maybe it's his daughter or his niece.
I like the idea of doing the gloryhole seen and one of the big it out based on something that the other person says something that the person would normally say in their own way the same way every time.
Like maybe he steps his toe almost zipped up his balls with the zipper and says something like" Fuck me sideways!" or maybe a line that he has said forever every time he's hurt himself. Maybe it was so good that she slips her card through hoping to meet him again. I like to toss around some ideas and see we can come up with something fun.