If you look at the settlement plan, it does say in section "A. Questionnaire" on the first page that in order to be a supporter (sponsor), you must be able to demonstrate among other things that any applications previously supported by you resulted in successful, permanent economic establishment in Manitoba.
It then asks on page 3 who you have sponsored before and where they currently live.
On the 4th page where you sign, you declare among other things that you understand that you will be prohibited from supporting the MPNP applications of other relatives or friends in the future if the present applicant and/or his/her dependents do not settle successfully and permanently in Manitoba.
So in essence, regardless of if your friend renounces PR or not, if she leaves Manitoba, you can no longer sponsor anybody else. If you want to sponsor somebody else now, she would have to stay until their sponsorship has come
Sorry, I have a follow up question. If worst comes to worst and I got banned from sponsoring, can my husband still get his family members? Or will he too be banned? Thanks!