[ 'Just enough' sounds like a euphemistic way of saying 'not as far as she can throw him'. If it bothers him, it doesn't show on his face, which remains pleasantly placid. ]

Mmm. I suppose we'll just have to do some relationship building.

[ One might consider building trust through demonstrating reliability, showing vulnerability, sharing thoughts and feelings — but not Astarion. His favored forms of relationship development have always tended towards the physical. ]

Why don't you let me help you clean up? 'You wash my back, I'll wash yours'?

[ He certainly doesn't expect to limit himself to the back, but that isn't quite as pithy. ]