Technically yes, Littlefinger asked to be named warden of the North
thats what I don't understand. he's going to either coerce sansa into marrying him or he's going to send a raven to cersei informing her that he's found sansa and can take her down. Unfortunately, I don't think Baelish knows the full extent of Cersei's troubles back in KL. She's practically neutered, powerless and fucked at the moment