Someone in your bath

You set a bath running, add the sea salts then leave the door open with the salts on the side. You go watch Youtube videos while the tub fills. This was the signal you and your mum worked out when one of you was horny and wanted mer-sex. Sometimes you would do it but often your pregnant mother would get cravings. Your growing child clearly liked frequent visits from its daddy.

It was now near the end of May with your mother in the first month of pregnancy, she was not showing yet. You had been able to keep your activities secret despite the more crowded house. Your brother's mainly played video games with headphones on shouting into the void. Your sister loved to play with your dog or watch T.V downstairs. You mainly spent time on your computer so it was easy to either hear the bath running and slip down the corridor or run the bath and your mum to slip in from her room.

You finished your video and headed for the bathroom. You could see a silhouette of someone in the bath, you felt your cock stere from excitement. You didn't want to walk down the landing hard so you tried you best not to think about fucking your hot mermaid mum as the bath filled. It never took long to get hard in the bath anyway so it is not like you needed to prepare. You locked the door and slipped out of your clothes. Your mum was being strangely quiet. You turned to get into the bath.