Why does Tywin Lannister keep Sansa Stark alive and wed to Tyrion Lannister after hearing that Robb Stark -LRB- and his mother -RRB- has died ?
`` Did Cersei Lannister turn Jeyne Poole into '' `` Arya Stark '' '' on her own accord or did Petyr Baelish suggest it with the forsight that he could reveal she was a fake so Sansa could inherit Winterfell ? ''