this isn't science babies or ips cells, this is " God's will "
No, they are. Hisa even mentions IPS cells so they clearly had some procedure done. The "God's will" part was a bit of insurance, making sure it was successful.
you are right, re-reading it now, that final scene has a different feel infact, but there was an other meaning in the "god's will", i intended that they are so good together that it's only right,...something like that...