No, your sibling cannot petition for you unless they are a US citizen, it will take some time for her to qualify if she has spent significant time outside the US, it may be 4 years and 1 day before she can apply for citizenship. After she applies for you it generally takes about 10 years for the visas to be current. You are mistaken about being in the US 5 years to be eligible to file for citizenship. You need to be a US permanent resident for 5 years, to qualify to apply for citizenship.
Answered on Aug 09th, 2011 at 1:59 PM