Continue talking in the nude

"But where's the fun in that?" you reply. Chiding her and taking pleasure in her discomfort. You pause before continuing to collect your clothes, "did you come to see me just to rub Sansa's face in her predicament?"

She quickly looks away again after seeing you still fully naked before her.

"No! I came to tell you to find Father. He seemed really odd yesterday after the raven from King's Landing arrived. You really should go find him...".

The mention of your Father begins to quell your erection. However much delight you were taking in making this uncomfortable for you sister, it would be better not to annoy Lord Stark more than necessary by dawdling.