PFFT, well Kurama will probably gently turn her down. She's a cute girl but I don't think he could be comfortable with someone who gets a rush out of pointless violence. Lol if Kurama ever had to transform to beat someone and Botan just shows up he'll just be all, "All taken care of, ...'honey'." or something else humorous. I don't think he'd ever get used to being tied down like that xD 

Yusuke and Kuwabara both knew Botan could GET IT son, no way could she NOT. Of course it will end up a funny story to tell them during a case or lunch. I think Hiei would be indifferent, but wouldn't put Kurama or Botan down for their decision. I think he respects Botan in his own way, and that's hard to get. 

More like kids >:3 no way to gauge power but seeing as Botan isn't a demon of any sort, nor an extremely powerful fighter, it's safe to say that their little spawns won't be ridiculously powerful as a birthright. They'd need to train with uncle Hiei xD