Specific manga that I read before but forgot the title

Its about this female who was walking with this guy and it was a hot day so when they entered the house, the guy couldnt take it as he was seduced by her sweat and smell and started to have sex with her. The female was later saying she did not want to get pregnant again. After finishing, the guy opened the door and he was slapped by one of a female kid who was with her little brother.


Forgot the title and much help appreciated.

You might want to move this to the Requests Forum. You'll probably have more success over there.