Advice: Would I be out of line telling her to figure it out on her own?

Background: US, Georgia, Married 35 years, I'm 53m she's 55f, the children are grown adults. Uncontested divorce papers signed at the lawyer last week, only used one lawyer since we are trying to keep it as amicable as possible. Irreconcilable differences is the reason for our divorce.

My STBEX wife and I are co-habitating our marital house until we can get a few minor repairs done then get it listed and sold. The divorce document has a date of about a year from now to have it sold. We agreed to leave each other alone but also to not bring any new romantic interests into the home during this period.

The problem is that she keeps coming to me to work on her "classic / antique" car... a 2006 Mustang that I wish never existed. The car has been broken down / idle for more years than it's actually been operational. But it's "her freedom".

Four days ago the convertible top wouldn't go up so she asked me to replace hydraulic fluid before it rained that evening. Two days ago one of the belt pulleys wore a hole in a coolant hose and she had to have it towed back to the house. She asked me to remove the old hose yesterday saying she'd find a mechanic to install the new part and refill / bleed the radiator. Except this morning she's in my room asking to borrow my car to get the new part. Then she gets home and asks me to do the replacement.

I am not a mechanic, I can change brakes and oil. I can watch a video or two and kinda figure it out but I don't own a ton of tools nor own a proper jack and stands (have to borrow stuff from friends). I'm a disabled vet with more aches and pains than I can count. Crawling under a poorly maintained sports car on my highly sloped driveway in 90+ degree weather (feels like 103) is not how I envisioned starting my weekend. When I owned a Jeep I would do more involved work on it but that was "my freedom", my hobby. I sold that Jeep a few years ago when I lost my gov contracting job to keep the ends meeting.

But here's the salt in the wound. A mysterious benefactor has given her $5,000 for her to take care of herself in our transition period. And her sister has given her an additional $1,500. These funds went into a joint account a week ago. I changed my direct deposits to a new bank last week, but haven't removed myself from the old ones because the house insurance is still at that bank.

She did cover the costs of the lawyer. She has even bought food and put gas in my car when borrowing it. But she tried to play the money off as "I got a birthday gift" before she realized I still could view the account. I'm not trying to claim that as a marital asset, even though she didn't declare the money during the legal consultations.