Board Thread:Spoilers!/@comment-24304025-20150202171011/@comment-25926288-20150427164858

Queen Wyverna wrote: I think Zelena made Robin believe that she was pregnant (with magic, or just with lying), and that it's not really true.

If they really had sex, well, they could have, but again, Zelena has magic and she could have brainwashed Robin or something. Stop and think. Zelena has no magic, so she can't do anything about brainwashing or faking. Zelena and Robin most definitely had sex (because Robin can't control himself) and no magic was involved. they also foreshadowed her pregnancy two episodes ago with her having "a meatloaf in the oven".