Can you do both? That seems like the key question for you.

Based on my own experience, I would say: Yes. You can do both. You can set SMART goals for your business and your career and have both. Entrepreneurship has transformed my career and gives me the vision that my corp colleagues don't have.

The next question would be: are you biz goals in alignment with your sister's? An authentic communication will take you to mutual understanding and you might reach an agreement that suits you both.

Good luck and call if you want to talk more.