Pay Dirt is Slate’s money advice column. Have a question? Send it to Kristin and Ilyce here. (It’s anonymous!)

Dear Pay Dirt,

My husband and I own several rental houses. When my deadbeat brother needed a place to stay after he was fired from yet another job, I agreed to let him move into a recently-vacated house until he got back on his feet. He said it would be six months, tops. Six months turned into six years until he finally moved out in February. He never paid a penny in rent (my parents ended up giving us $500 a month on his behalf). However, he left some furniture behind.  One of the pieces was an old secretary desk he got years ago at a consignment shop. After repeated attempts to get him to pick up his furniture, he finally told me, “do what you want with it.”

When my husband and I were going through the piece to get it ready for donation, we found a hidden compartment. Inside, we discovered a rare first edition comic book. We looked it up online, and given its near-perfect condition and scarcity, it could easily sell in the six-to-seven-figure range. I can’t imagine my brother was aware of it since he would have certainly sold it long ago if he knew about it. Are we under any obligation to share whatever proceeds we get from selling the comic book with him, since my brother relinquished his ownership of the furniture he left in the house to us?

—A Super Find

Dear Super,

Yes, your brother relinquished the desk, but he didn’t necessarily realize what he was giving up inside it. Under normal circumstances, the fair thing to do would be to give back the comic book —or at least give the person a heads up about it, and suggest splitting the profit. On the other hand, it sounds like he’s been taking advantage of a good situation for years, and, well, maybe this is your only chance at payback. So what sits right with you?

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Only you can decide how to answer that question, but there are some factors to consider here. First, is there a chance that this is his comic book ? Could it be something he bought himself, or is it definitely something that came with the desk and he overlooked it? If it’s the former, the right thing to do is probably to give it back. But if you’re uncertain, asking him about it might not yield an honest answer. If he’s the kind of person to take advantage, he might take advantage of this scenario, too. Still, it’s something to think about. Also, you’re clearly carrying some resentment, and it may be warranted, but resentment is not necessarily something you want to shape your ethical choices. If you do decide to sell the comic book without letting your brother know about it, I’d check in with a lawyer first and make sure you truly have a claim to it.

But I’d probably just talk to him about the comic book. This isn’t, after all, really about the comic book, it’s about the fact that he overstayed his welcome and never paid you rent money. Trying to recuperate that lost income via this find might feel fair to you, but ultimately, it’s not exactly honest and might just end up weighing on your conscience. Also, did you ever talk to him directly about what you could and couldn’t offer him, housing-wise? It is your obligation as a landlord to be direct with tenets about what you can and cannot offer them—even if they are related to you. This might even be a good opportunity to clear the air, share your feelings directly, and pitch splitting the money from the comic book sale so that everyone comes out ahead.

—Kristin

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I’ve been dating my boyfriend for four and a half years, and we’ve been living together for over a year and a half. I didn’t want to move in together until marriage or at least engagement, but he didn’t want to commit until we lived together. So I agreed to move in with him and hoped that we would get engaged sometime after that. About a year into living together, we began fighting regularly. As we were working through our issues, I came to the realization that he wasn’t anywhere close to proposing to me or planning to. I confronted him in an unpleasant way.

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