This is a newsletter bonus question. Care and Feeding is Slate’s parenting advice column. Have a question for Care and Feeding? Submit it here.

Dear Care and Feeding,

My wife’s sister, “Renata,” and her husband have 1-year-old twin boys. Two weeks ago, Renata called us saying that her in-laws had just been in a car accident. She and her husband needed us to watch the kids so they could go to them and would give us an update as soon as possible. We, of course, agreed. My wife and I spent the next several hours watching two babies while on edge waiting for the worst. Then Renata finally sent us an update—in the form of a pic of her and my brother-in-law in the audience at a concert in NYC!

They dropped the twins off on a Friday morning and didn’t pick them up until 7 p.m. on Sunday. I am beyond outraged that my sister-in-law and brother-in-law would fake an emergency and manipulate us in such a selfish way. I told my wife they can look elsewhere for childcare from now on, regardless of the circumstances. My wife wasn’t pleased with Renata’s deception, but thinks this is going too far. She’s fine with not watching their kids in general, but thinks that we should help them if they have a genuine emergency. As far as I’m concerned, they should have thought about that before they played us. My approach is more than fair considering, right?

—Don’t Cry Wolf

Dear Don’t Cry Wolf,

Your sister-in-law’s behavior is stunning in its rudeness. Like, truly, it boggles the mind. Usually when presented with egregious behavior, I invent elaborate excuses that might lead a Reasonable Person to behave in such a way. But your sister-in-law’s behavior defies even my most empathetic logic.

Instead, just facts: Your wife’s sister is untrustworthy, manipulative, self-centered, and immature! Her husband sucks, too. You don’t owe these folks anything, ever again. You absolutely are in your rights to decline any future favors, whatever excuse she conjures up. Renata has burned her bridge with you, and you’ve got a hard boundary now. Good!

Your wife, however, is her own person, and if she wants to keep herself open to her sister’s manipulations, she can. Try not to judge her too harshly for it. Forgiveness and empathy are good traits, generally. Don’t begrudge your wife her good heart. But do tell her that you’re done helping her sister out.

—Logan

Classic Prudie

When my husband was 16, he began an affair with his aunt, his mother’s brother’s wife. She was 35, and I believe she took advantage of him and lured him into an affair when her marriage was falling apart. They remained in a relationship for 10 years. He ended it six years ago. We have been together for three years and have young children. He told me about this affair before we were serious, and he said it had been true love. Now he has deep guilt and regret. At times he has even wondered how he got so lucky with our family given his “great sin.” The problem is that because he is close with his cousins, his aunt’s children, she still has access to our lives. I have no reason to believe he is in contact with her. But he asked me to accept his cousins’ friend requests on Facebook, which I did and now regret. I am really struggling with all of this. I want to delete his cousins and asked him to delete them, but he says they are his cousins and he can’t. We have fought about this several times. Am I being crazy?