hey thats ok not a big issue two of my sisters were canadian citizens and my brother had work permit when i applied
what you need to do is write a good SOP and make sure you show ties to pakistan like share in property here what i did was show that i have a share in property and also my brothers business i also had 57 credits exempted from my studies so i guess that helped also but its not a big issue to convince them that you wont work there illegally and you will return back to pakistan after your studies the only reason they need to be convinced is to make sure people dont work here illegally if you already have tax paying law abiding sibling here this actually improves your chances of visa they dont care if you stay here after getting your degree as long as you dont do it illegally