Offer Declined, One party isn’t budging. Husband has accepted the offer but the ex-wife’s new heir says no.

I made an offer on a house in PA, we are gapped at 10k below market value. The man who lives in the home has agreed to my offer but his ex-wife’s heir is not budging. The house is close to going into foreclosure. The man has solely lived in the home for 10 years alone and is a hoarder. They had placed the home for sale 2 months prior to her death. The listing was taken down and replaced at a higher listing price by the heir. It’s assumed there is a marriage because the title hasn’t changed to the new persons name and it doesn’t appear to be going through probate. She has signed the disclosure form as if she is already an owner. He wants rid of the association with the new owner and I get she wants as much out of it as she possibly can. She’s blocking the sale. My realtor just mentioned that they are going to have them officially decline my counter in such a way that it shows he agrees and she does not and then they are going to try to involve their real estate lawyer to somehow push the sale forward. I honestly have no idea how that’s going to work. I don’t even know why it’s worth the 10k to even involve the lawyer. The reason it’s 10 under is because of the hoard. My only recourse is to break the contract or take it as-is should something arise that’s not normal wear and tear and I won’t know until the final walk through so there is a reasonable risk to that. The gap accounts for 5% of the asking. I know no one here has the answer but has anyone had anything similar where one party refused and how did it end? Did you just move on or did you increase your bid to complete the sale?

ETA: I have not seen the full deed but I was able to view online some of the details and it appears they had an enhanced life estate deed. The filing also indicated the divorce. So it does pass probate and the partner while not yet on the title does have a stake.