I was dejected as I whispered lewd words to her mother

The other day, I went to her house for the first time. It was also the day I had sex with her for the first time. However, the outcome was a failure. I was depressed and decided to stay at her house. However, the room I sleep in was not next to her, but the couple's bedroom. So I doubted my ears. Her mother was whispering lewd words to her husband. And then my pussy, which hadn't been erect with her, started to get an erection quickly...