That is a definate possibility. So Eirin tested a new drug on either Tewi or Reisen or both. Wonder if it was a success or just too cute to call a failure
KnightBlades said: You mean, whose got the package and who delivered? xD
This is the single most confusing metaphor for parentage, since I can see it going either way depending on how 'got the package' and 'delivered' are interpreted.