Jeyne Westerling & Cersei's downfall

[Niolani]

Forgive me if this has been discussed but I think I picked up on something. When Tywin was talking to Tyrion, telling him about Robb's marriage to Jeyne, he comments that she is her mother's daughter. I took this to mean that the whole marriage was relatively schemed on the go, as such, and that Sybelle Westerling was in cahoots with Tywin. I don't mean everything was planned but I belive they co-operated when the opportunity arose to stuff up Robb's alliance with the Freys. My belief is furthered by the fact that Jaime observes that Sybelle was a schemer and had orchestrated a deal with the Lannisters for notable matches for her children. Also Sybelle tells Jaime that she had made sure Jeyne was not pregnant. Previously Jeyne had told Catelyn that Sybelle made her a fertility posset of herbs and such, which makes me think that she was preventing Jeyne from conceiving, as per her deal with Tywin.
I picked up on another thing I found interesting, I think the Magei that cursed Cersei was Jeyne's grandmother or great grandmother as Tywin tells Tyrion that Lord Westerling should never have married Sybelle Spicer as she was desended from some witch woman a Spicer had bought back from the east, which matches in with what Cersei's POVs tell us in aFfC. So, is it possible that Jeyne will be Cersei's downfall? She is still considered a queen by some and if her own grandmother was Cersei magei, it would fit neatly. Sorry for the rambling.

[Winters_Sorrow]

Good theory, but the maegi never said that she would be in any way connected to Cersei's downfall.
As for Sybelle, yes I think she could have quite easily engineered with Tywin the betrayal (after all, the Westerlings are his vassals!), but I don't think Jeyne or her father,brothers knew as they fought for Robb and seemed stunned by his death.

There's other Jeyne theories in here dealing with her pregancy, including one saying that she is still pregnant, the 'real' Jeyne is with the Blackfish and this is a fake which her family are playing along with etc etc which I'd love to believe.
However, life is no fairytale sweetling, as GRRM puts it, so I think Robb's child died in the womb and the army of the North has no further significant part to play in this tale.

[Lord Snow]

The Starks and the north will return,Winter Is Coming

[wedgiey1]

Where are these threads about Jeyne being pregnant and the one being a fake etc etc? Jeyne's role always seemed a little off to me, like there's something missing. GRRM seemed to give her a lot of importance for her only role to be as a tool used by Sybell and Tywin...

This thread is ancient, I know, but I thought it'd be best to post in this than to start a new one!

[Charming Serpent]

Nio, your theory is correct in all accounts except that "Queen" Jeyne will have nothing to do with Cersei's downfall.