Is OTHER wrong in the post ? POST : TLDR: Scroll to "yesterday" at the bottom

&amp;#x200B;

Timeline:

3 years ago: My sister, her boyfriend, and their 2 sons (ages 5 and 2) were living in section 8 apartment in North Carolina, due to both of them having zero credit, and both being irresponsible people. They never cleaned the apartment, which lead to terrible smells and filth.

2.5 years ago: My father (lives in Florida) decides that he is going to help them **get a house**, because he "can't stand the thought of his grandchildren living in section 8 housing." He takes out a $230,000 mortgage from the VA and buys them a nice 2,400 square foot house in North Carolina. With the agreement that my sister and her boyfriend will financially contribute to the mortgage payments "once they both get on their feet." Since that time, **they have never once honored the agreement** to financially contribute to the $1,700 monthly carrying costs of the house. My father has been paying every bill for the last 30 months.

1.5 years ago: My sister and boyfriend no longer get along. There is substance abuse and domestic violence going on at the house. He moves out into his own apartment 30 miles away. My sister and the kids remain in the 2500 square foot house, my father continues to pay all the bills. 

6 months ago: My father has multiple heart operations and his health starts to significantly decline (he is age 80 now). I decide that he can no longer live alone in Florida (there was no family member within 1000 miles of him). **We decide that my father will go live with my sister**, since the house has 2 extra bedrooms, with the idea that he will continue to pay the bills (has a good pension thankfully), and my sister can "keep an eye on him."

4 months ago: I move my father out of his house and drive him to my sister's - **we arrive in NC find that the house has become derelict under my sister's care.** Cockroaches, overflowing toilets that have ruined flooring, filth and grime everywhere, broken doors, holes in walls, etc. The house was derelict. Keep in mind now, that my sister has no job, and has my father paying all of the bills. Yet she cannot even keep this house moderately clean.

3 months ago:  **we decide that my sister cannot manage the house and it needs to be sold.  Unfortunately, in the condition that it was in we would have only gotten $180,000 for it, despite my father owing $210,000 on the mortgage.**  As a result, **I move into my sister's house for 6 weeks and do about $15,000 worth of renovations (completely free of charge) so that this house can be sold at an amount that will cover the outstanding mortgage.** My sister didn't lift a finger to help me once during the entire time I was there working on the house.

2 months ago: I leave the house in mint condition, ready for my mother to hand the house over to a realtor to complete the sale. My sister and children go live with my mother (because my sister was actively drinking and cannot be trusted to raise children alone, let alone not destroy the renovations that I have done on the house). My father (health failing) goes to an assisted living facility and hands me power-of-attorney over his estate. I move back home to be with my fiance and get on with my life.

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Yesterday: I get a phone call from my mother to let me know that:

A)  my sister has gone to a 1-year alcohol treatment program (not the first time this has happened - usually she checks out of there in a month).

B) my mother has decided **not to sell the house, and to instead have my sister's ex-boyfriend move into the house that I just renovated so that he can raise my sister's kids (who are currently living at my mom's house and are too much to handle - ages 8 and 5 now).** Furthermore, my sister's ex-boyfriend **can only afford to pay $1,000 a month out of the $1,700 monthly carrying costs, which means my father will be picking up the rest of the tab from the nursing home** until he dies (then I don't know where the extra $700 will come from). Furthermore, she never consulted me before making this decision (despite me a) being power of attorney over my father's estate, and b) busting my ass for 6 weeks free of charge to repair that dump that my sister and her kids destroyed.)

**My concern:** I left that house in mint condition 2 months ago, ready to sell so that we could pay the bank back the $210,000 mortgage and be free of this burden of a house. If my sister's ex-boyfriend and those kids destroy the house again, I wont be able to sell the house at a high enough price to cover the outstanding mortgage, and any inheritance money will go to pay the bank. **I've suggested to my mother that the ex-boyfriend and my nephews just go live in a condo that he can afford instead - she responded that is impossible since he has no credit. This house is the only option.**

My question: Am I being a selfish asshole here? And if not, what would you do if you were in my shoes? Thank you.