Game of Thrones Season 6 Episode 5 was an episode filled with shocking revelations, most of which were more expository than action-packed. But major characters did learn some key bits of information. Gendry is alive and looking more attractive than ever. Rhaegar and Lyanna were legally married, thereby making Jon Snow not a bastard. Cersei is pregnant. Or, at least, that's what she wants Jaime to believe. However, there is always the possibility that Cersei is lying about being pregnant on Game of Thrones. Some fans are absolutely convinced that she made the pregnancy up as a way of convincing her brother/lover Jaime to stay loyal to her. If that really is her plan, then it appears to be working so far. But what if she's not lying? Is Westeros in for another Joffrey situation?
There are a lot of reasons for Cersei to tell Jaime she's pregnant. He was on the brink of turning away from her, going so far as to meet secretly with Tyrion. (It turned out that she already knew about it, but still.) He was trying to convince her that she'll never win the war against Daenerys, and she definitely appears to be losing her grip somewhat. Of course, as soon as she told him she's pregnant, he seemed delighted, if worried. He appeared to feel those two things particularly strongly when he asked who they will say is the father and she responded by saying, "you."
If she's not lying, she is certainly laying it on thick. There are also a couple of reasons to believe that Cersei perhaps cannot get pregnant anymore. In Season 3 when Cersei was betrothed to Loras Tyrell, Lady Olenna argued against the match by saying that Cersei was too old to have anymore children. "Her change will be upon her before long," she warned Tywin. "I'll spare you the details." Though that couldn't just been Olenna making another dig at Cersei out of spite more so than anything else. (God, I miss that woman already.)
There is also the matter of the prophecy to consider. When she was just a young girl, Cersei went to see Maggy the Frog, a witch who told her that she would be queen, and that she would have three children who would all die before her. Which they did. The witch also said that the King, Robert Baratheon, would have 17 children, which he did, leading me to believe that this prophecy has proven to be legit thus far. So wouldn't that make having a fourth child unlikely?
And then there is the matter of plot. There's just not enough time left in the story for an entire Cersei pregnancy. The trope of seeing a manipulative women fake a pregnancy on TV just so she can keep her man is tired, boring, and irritating. So I want to believe that Cersei isn't making this up. But if she is, I am convinced that it will spell her downfall.