unexpected guests were on the way, and my mother, an impeccable housekeeper, rushed around straightening up. 
不速之客就在路上，我妈妈，一个完美的家庭主妇，正忙里忙外地整理。

she put my father and brother to work cleaning the guest bathroom.
她分配给我爸和我哥哥的任务是打扫供客人使用的浴室。

later, when she went to inspect it, she was surprised that the once-cluttered room had been tidied up so quickly.
一会儿之后，当她去检查的时候，她吃惊了，曾经一度杂乱的房间瞬间就被打扫干净了。

then she saw the note on the closed shower curtains. it read "thank you for not looking in the bathtub."
接着她看到浴帘上有一张纸条，纸条上写着：“谢谢你没往浴缸里看。”