User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Arthur/Guinevere's Child/@comment-4814726-20120928203254

It's not like sex has never been mentioned in the show before. Remember thescene in The Changeling? And in eauty and the Beast? Sex is implied,so you dont know what it is unless... you know what it is.

But yeah big boobs are not proof of a baby from Arwen. It's a possibility whether Gwen has big boobs or not.