Kate Kerrigan said this quote

We both grew so used to each other, so comfortable with the naturalness and ease of our friendship, that we became sloppy about keeping our relationship a secret. It was not that we were physically demonstrative or obviously in love, more that it had become impossible for us to hide our close involvement. We had gradually acquired the unmistakable air of old-love: finishing each other's sentences and speaking to each other with an offhand, presuming intimacy that was eventually noticed.