She cannot cancel the I-864 she filed for you even if you two divorce. The only two ways her obligation ends is if (1) you work in this country for 40 quarters (or 10 years), or (2) if you become a US citizen. Until or unless one of those two conditions are met, she has the obligation to provide that poverty-level support to you regardless of your marital relationship. Thus, do not be alarmed if she threatens to cancel.
Answered on Sep 08th, 2017 at 7:39 AM