When Phil had a health scare, Claire gets dressed up for the hot firemen who are coming for him. She admits this to Phil before his procedure and he reminds her of it upon waking. After Claire apologizes, Phil says he will be fine with time even though he is fine with it now. Phil believes Claires guilt will grow over time giving him more bargaining power in the future.
See more: bargaining power, markets, prices, reciprocity, trade, value