Wait a minute, at the end of last chapter he said that "She's my partner. She's been born to tear out my heart." but in the beginning of this chapter he said "She'll be my partner, and I'm destined to tear her heart out."
I am sorry. That was our mistake. The text at the end of chapter 73 has been changed to 'She's my partner, she has been born for me to tear out her heart.'