Don't do this. No matter your situation. As an artist, I know that scams happen all the time. Don't get mad at us for wanting to make sure.
First mistake: telling the artist about your dying family member, financial situation, etc., whether you have one of not. This will likely only make the artist uncomfortable and suspicious of you. It's a red flag for us. Do this, and we'll likely not draw you anything regardless of what you say next.
Mistake two: getting upset at the implication of calling you a scammer or asking for proof. For some people, art is their living. The fact that they'll even consider doing art for you if you have proof is extremely generous—they could've just said no off the bad. In additions, avoiding proof like this only makes you look worse and us more suspicious of you. Either provide proof or come clean and apologize.
Mistake three: threatening the artist. Don't do this. Especially if there is no scientific or logical proof behind your threat at all. I'm not a doctor. I have zero experience in the medical field. I haven't even ever seen this person before, much less their brother. There is no conceivable way that this would be my fault. Art is great, but it doesn't save lives like that.
How to improve your tactics:
If you find you absolutely must ask for art and can't resist just waiting until the artist just announces they're opening requests, here's what you can do to have a bit better of an experience, whether you're able to get free art or not.1. Do literally anything other than what this person did.
2. Give feedback or praise on the artist's work. We're artists. Our art is our pride and joy, and we love being told that it's good. The more specific and detailed your feedback, the better. But make sure it's true!
3. Be nice. Be polite. Be respectful. The kinder someone is to me, the more likely it is I'll do art for them.
4. Don't get angry if we say no. This one person asked me for art and I said no, and they we so awesome about the whole thing—they kept their head, they were kind and polite... And it just stuck in my head how nice they were about it, so much so that I offered to draw them something the very next day.
5. Don't use PM, comment on walls or message boards. PMs are a hassle to deal with, and we also feel you're being more truthful about your situation and that you won't threaten us/explode at us if the conversation is public to see.
6. Try not to use guilt-tripping, whether it's justified/true or not. It makes us uncomfortable, and it's often a red flag.
7. Be patient and wait for requests to open again. This is 100% the best way to ensure you don't have a bad experience with an artist.And now, because I'm still salty at being threatened like that, and I feel the need to spite them,
Requests are open!
I will only take a few, but be sure to comment below with what you'd like drawn and drop an @Cats_Pajamas in the comments section of your character's ref ^^ you can also ask for canon characters from any of the fandoms I've talked about or posted art of here.