Ygraine's not wandering the halls, exactly. She's looking for Bors, who she hasn't seen since she returned from her honeymoon and time with the Druids. She hasn't been to see either of her parents yet, because she expects them to still be in meetings.

She's looking in the corridors nearer to the stables, when she almost literally bumps into someone. Someone who isn't Bors. Someone who is her father.

Ygraine backs up a little bit. "Er...hello, Father."

To say it's awkward is to put things lightly.