Is my sister in law my partner after investing after 1 year i put up my business or just an investor?

So is it a partnership or is it a corporation? It can't be both. Sounds like you really haven't done anything in writing and really haven't shielded anything from anything. If it's a partnership then your personal assets and properties are at risk. If it's a corporation then the division of the shares had to be defined and you wouldn't have to be asking this question.