My company wants me to train the person moving my job overseas

Dear Delyara, My role is being outsourced. The company has offered a retention payment if I stay for three months to train the team taking over my work in another country. I need the money. My daughter starts university soon, and my mortgage rate increased. So every morning I log into video calls and explain processes I built over twelve years to people who are polite, capable, and innocent. They ask questions. I answer thoroughly because doing bad work would feel like betraying myself, even though good work is making my own redundancy easier. Yesterday, one trainee said, “You must be excited for your next opportunity.” I told her yes. After the call, I shut the laptop and cried in the kitchen. My manager says this is a business decision, not a judgment on my performance. That sentence is supposed to comfort me. It does not. I was good enough to create the work, good enough to teach it, and too expensive to remain the person doing it.