Reluctant Husband story

[Hsobdamua]

I read this story a few years ago and now for the life of me can't seem to track it down. This man was heading home from work. He and his wife had intentionally not had sex in a while to increase odds of conceiving. Tonight was the night they were finally going to have sex and he was eager for it. He's thinking about this on public transit on the way home (subway, bus, who knows). It arouses him. A woman sitting near him (and her friend) see the bulge in his pants because he is very well endowed and one of them can't help themselves. Despite his reluctance, she initiates sex. At some point her friend takes a turn. They're marvelling over how big his cock is. In the end, he's forced to creampie one of them.