Having his mother do it would hopefully make sense given their ages now. Hopefully she drinks slightly less, since after he did die, she did so considerable remorse and I'd think any parent would try anything to get their kid back. That would work for me. So that leaves us with the starting point that: Kieko wasn't taking care of Yusuke's body and that it was his mother, it was also his mother who kissed him. Yusuke did still help Kuwabara pass some difficult high school exam and he still got the egg.

And I imagined the crazy fangirls akin to those of Yuki's from Fruits Basket, the crazy type who he doesn't notice that much, though his ego would sure love the attention haha!