Practically every time someone claims to "earn" money from doing absolutely nothing, they either inherited it (sometimes at a young age), or they are lying about how they made it. In fact, they might not have made any money at all. Sometimes they may even be running a ponzi scheme. In order to earn money legally, you have to actually earn it. If you aren't giving anything in exchange for money received, you didn't technically earn it. That doesn't mean the only way to make money is to earn it, it just means that in order to earn money, you have to actually take a risk or do some sort of work.
It sounds like this person's entire story might be a scam designed so that he can steal personal information about you (bank account information, etc.) or get your info so he can write bad checks in your name. Here are some of the biggest holes in his story:
His aunt, if she is even a real person, signs a check in your name. This means that she is engaging in check fraud, which is illegal under U.S. law and can carry some serious consequences. It sounds like she would be writing a check and signing it with your own name, and then presumably this guy would cash the check and send the money to you. In the best case scenario, you likely would never see the funds in your account, but your bank account wouldn't be cleaned out. It sounds like he may be trying to steal your bank information so he can take your money. Worst case scenario, this guy and his aunt write all sorts of fake checks in your name and get away with it because everyone thinks you wrote the bad checks, since they had your signature. This could potentially get you in a lot of legal trouble, especially if they use your real bank information on the checks. They may even try to get your bank account info to "send the money to you" but in reality, they just take the money in your bank account and disappear.
Why would she sign a check in your name and have her nephew cash it instead of simply making the check out to you and sending it to you directly so that you could cash it? That would save a lot of time and hassle. This seems like an extra, unnecessary step and is extremely suspicious. He probably has no intention of sending you any money at all and he just wants your bank information.
The guy says he wants to send you the money from a check written in your name, but why would he just send you money in exchange for nothing? People don't send money to other people for free unless they are giving a gift or are giving to someone in need.
As amazing as it sounds to be able to simply have money sent to you for free, it is almost certainly a scam, and you should avoid giving this guy any personal information about you, no matter how tempting his offers are or how good his scheme sounds. Especially when it comes to finances, if it sounds too good to be true, it almost certainly is. This can be an easy concept to understand in theory, but it can be very difficult to resist some schemes, especially if they are perpetrated by well-respected people.
A famous example of a too-good-to-be-true financial scheme was Bernie Madoff's investment scandal. He was a highly respected Wall-Street financier who perpetrated the largest Ponzi scheme in history. He pitched a legitimate investment strategy and fooled many people into "investing" (and eventually losing) large sums of wealth with him.
All of that is to say, if you feel confused about someone's investment or money-making scheme, and it seems too good to be true, do not give that person your information or invest any money with them. You won't receive any money in your bank account, you'll just end up getting scammed.