guys, actually it was REN who said he wanted to name all his children after flowers. that's why he so readily came up with the name satsuki, he was probably saving it for one of his own.
and though all the signs point to something fishy happening to ren, i just remembered something pretty obvious. when hachi gets those pictures of blonde!nana singing in the pub or wherever, someone says it might have been ren who left them.
i guess things will make sense eventually, but geez.
as for little ren possibly being reira's, that i thought at first but am no longer sure of. he refers to her by first name, not to mention both takumi and naoki make references to him going back to japan, presumably to go back to hachi and satsuki. besides the fact that i don't think nana k is THAT much of a pushover to raise some other broad's kid, when reira's talking about him, she says she always wanted to destroy everything takumi held precious except for little ren. doesn't seem very motherly to me.