The sounds of their married life can be heard every night... It seems that they both want children and are working hard to make one. One day, unable to resist, I peeked into their bedroom and my eyes met with my sister-in-law Eimi, who seemed bored by my brother's routine sex. That night, my sister-in-law Eimi invited me to cum inside her. After that, after having baby-making sex with my brother, she started to demand my sperm into her uterus. I wonder whose child Eimi will become pregnant with, mine or my brother's...