u/HekmatyarYure

I remember the specific sentence of House Prewett becoming the House of Potter's vassal for the twins "owing a debt that can never be repaid"

Iirc they referred not only to Harry giving them the money to start their shop, but also the fact that Molly and some of the Weasleys (not including them, Bill or Charlie) were stealing money from his account without his knowledge, there was some Weasley bashing