Answer:
she was under undue influence from her son and daughter in law and therefore the contract is voidable
Step-by-step explanation:
Since in the question it is mentioned that the broker made a purchase offer to a disabled woman also his wife and her son are present. The price is very much lower and in the case when the women accept the offer and later she said due to pressure she accepted the offer.
As she is a disabled person and the people who are disabled, blind, are not capable to enter into a contract
Therefore the contract is voidable