But it is very likely that your sister claims the right to this suite, and then the court will mediate to see if one of you is willing to pay the other party, and the one who pays will inherit the house or allocate the house after the auction.
This apartment is not yours until it is confirmed. Even if your sister gets married, she will have the same inheritance rights as you. Even if she can prove that she usually takes care of your parents more or spends more, she may inherit more than you. So this house doesn't belong to you yet, so this property certificate can't be used as collateral.