house/act of closing question

Can I refuse to extend to the closing date on a house and any new paperwork that comes in? I have been dealing with a dumbass buyer for almost 3 months (since mid june)

I am tired of her never ending list of demands and BS. We accepted her low offer because we wanted this to get over with fast. But all she done is drag her heels. Its nott like she can sue me because my money is well hidden in a variety of places)


The background story. (potential TL;DR trigger warning, lol)

Yes. I know, holy wall of text. I inherited a house and put it on the market in early July. It was appraised at a good price. In the first week, someone offered a price about %20 under the selling price and we agreed so we could get this over with quick. She also gave a take of woe, etc and we felt bad for her.

The act of closing was to be held Aug 15. That day came and went and she is still doing nothing. She also expects us to hire a spanish interpreter at out cost to have for our negotiations. We refused to pay for that.

Then she said there was an obstruction in the sewage line. It still is completely functional but something keeps the camera from going thru. We paid to have it inspected twice and told her the cost would be paid for us.

She wants us to pay the most expensive price (7500 - professional plumber) in cash and give the cash to her. ( her pro plumber said he could fix it for $1000 or less).

She also now want to extend the act of close till late next month and I refuse to sign the papers. I will NOT give her another month when she has already wasted 2 months of our time.

At this point I am no longer interested in selling her the house. She has done nothing bitch and complain. My sis is in agreement and we own half the house (with 2 other relatives). We can just put on the market and make about 10's of thousand more on the deal with no hassle.

Can she try to sue us for something if we refuse to sign?