My wife was away, and her sister Rino was traveling nearby and wanted to stay at my house for about four days. This sister-in-law has a very strange hobby that is... completely naked while indoors! Walking around naked made my G-cup breasts constantly sway in front of my eyes. Moreover, Rino also deliberately created provocative poses, touching as if he wanted to tease me! By the last day, my stamina had reached its limit. I ignored it all and kept fucking this charming sister! We were intertwined inseparatly, and as a result, I cummed inside her ten times! When I returned, Rino asked me if I could come here with me again. Although I knew this was extremely wrong, I didn't think much about it, I wanted to enjoy this feeling of happiness more. And so, I agreed to her expectations.