As long as he doesn't leave hurt, her usual way of admitting apology was having people let go from the tower with their heads in tact. This is sort of strange and... difficult.

"Hardly. All the things I would wish never known are openly gossiped about, I cannot imagine they escaped history books." Not that they knew of any part of her own conflict. She still had no idea if she should hate her father or not. She still didn't know if she could kill Dudley either. Nor could she express a single part of her confliction about it. Perhaps that was what he was talking about.

When he says that though, drunk as she is, she hugs him. Regardless of him being sick, and leaves a kiss in his hair. Being affectionate is as much a habit as concealing everything.