If all parties agreed on the terms of selling a property, but one of the sellers backed out, should she have the right to do that after agreeing?

If all parties agreed on the terms of selling a property, but one of the sellers backed out, should she have the right to do that after agreeing? no word limit.

If the partners have agreed to selling in earlier agreement than one ofthe partner’s at a later stage cannot back out under general termsand normal process. But this should be understood in...