I don't know... I read a fanfiction once and I really liked how it came out. Im sorry but I forget what its called. well it kinda goes like, Kagome is scared that now that the Shikon no tama is purified she will never be able to return to the past so she stays with inuyasha. She drinks a potion that makes her a hanyou and after 22 years has 6 kids... I think, mabey more. Well one of them jumps into the well and ends up in the future, so of course everyone else follows, kagome inuyasha, and all the pups. In the future it has only been 2 weeks so there is some sort of time change going on... kind of confusing. but she and inuyasha go back to the past with the pups and seal off the well forever. In 478 years (from the past time) Inuyasha and Kagome have a family with about 300-400 kids still... mabey more. I don't know. If you can find this story on fanfiction.net try reading it. It is very long! took me about 3 days to read it. not recomended for anyone under 17. but I think that, that is what should happen.