Well I can easily come to the conclusion that the runaway spirit that possessed Urara's mother has found a new host in Urara herself, thus amplifying her desire to be an adult.
Considering this, her body should be at least in the early twenties in age now. Only thing though is that with her still retaining that immature mind of hers, things don't bode well.
Still, seeing a seven year old boy trying to win the affections of an adult woman (despite still having the mind of a child) is certainly going to be an odd yet unique scenario.