Incestuous [silence] Incest. My father is next door...

I married a man older than me. The man has a stepchild named Taro, but perhaps because they are close in age, they are nervous about each other. I'm trying my best to get along with Taro-kun, but... But lately, I feel like Taro-kun's way of looking at me has changed. I hope it's just my imagination...