With a hearty 'Yes'.

"Your Graces, how can I refuse such a noble offer?" asked Catelyn. "I am more than pleased to serve the crown as Her Grace's chief lady-in-waiting."

Cersei smiled at this, standing up and approaching Cat's chair. "Excellent! Why don't you and I retire for the night, so we may... iron out the details of this new appointment?" she said, running her hand over Catelyn's shoulder.

Cat gave a delighted shudder. "Your Grace, there is nothing I would like to do more," she whispered.