Elven princess - childless?

[Gatts]

Elven throne hier girl + marriage = wife
wife + blessing from tree of life = children?
NOPE - she told me she needs blessing, tree agreed - gave blessing, option to get kids open in our conversation - conversation ends with (you kissed your wife) [I suppose more than just kissed...] - for some time the option of kid dialouge was missing (as designed) - but no kids came, (not only one, not even such kids that looks like my squire or my horse), well and after all the dialouge option for having kids re-appeared (after x combats), again and again...

Is this normal? (I say not... the elven girls got some serious problems!)