PR and TRVs are different programs. For PR, you need to meet LICO for the number of people in your family including your spouse and children for at least 3 years. They need to selected in the lottery, and all must pass the medical. If one doesn’t pass, no one gets PR. Do you meet LICO for the number of people in your family and for at least 3 years.
TRV - your sister has to show her own ties to return.
Is your mother-in-law in Canada on a supervisa? Read in another post about you looking at a family member claiming asylum on a super visa so not sure what you are trying to do. Who is claiming asylum and why?
https://www.canadavisa.com/canada-immigration-discussion-board/threads/urgent-issue-super-visa-and-wanting-to-apply-for-refugee.647591/page-2#post-10559226
hi there, We are in similar situation. Please advise me if you get an success & how. I am too worried about my family in home country. Please please please reply