According to Pixiv Dictionary, this comic is what started a Japanese trend that centers around the phrase ふしだらな母と笑いなさい ("Go ahead and laugh at (your/this) loose mother") being used to encapsulate how Nishizumi Shiho had developed a cult following in fan art and doujin works, even earning the nickname "the woman whose doujinshi was made by her daughter" (娘より同人誌を作られた女), all despite having very few appearances in the TV anime and sequel movies. It's speculated that this phenomenon had contributed to her increasingly featuring in official illustrations dressed in swimsuits, Santa costumes, and other revealing outfits; quite a few pieces of fan art of similar nature are tagged with ふしだらな母と笑いなさい on Pixiv, incidentally.

There is, unfortunately, a dark side to this: Many of her doujin appearances involve netorare scenarios. Therefore, tread carefully if you decide to look up porn of her.