LF actually approaches her and starts the conversation with a creepy 'you must be her daughter' and a creepier stroke of her hair.
“I’m Sansa Stark,” she said, ill at ease. The man wore a heavy cloak with a fur collar, fastened with a silver mockingbird, and he had the effortless manner of a high lord, but she did not know him. “I have not had the honor, my lord.”
Septa Mordane quickly took a hand. “Sweet child, this is Lord Petyr Baelish, of the king’s small council.”
“Your mother was my queen of beauty once,” the man said quietly. His breath smelled of mint. “You have her hair.” His fingers brushed against her cheek as he stroked one auburn lock. Quite abruptly he turned and walked away.