Science babies is for when both moms are the biological parents. So even if they were conceived through a magic spell, through playful dry humping or the exact means of reproduction is unknown, it counts.
Replaying Extra and playing through CCC, ngl makes me love Tamamo more and more. Also her ending in Extella is great too, being that of the three, shes the only one that has a happy-ish ending (barring the final route).... is that spoiler? I feel like it is.