Why don't you just file a police report, for theft? I am sure that you would get it back , immediately, if not sooner! Keep them out of the will anyway, just DON'T tell them about ANYTHING. They WILL try and make a huge deal out of it, and BLAME YOU. Your mother is gone and her necklace is your only connection, now. YOUdon't have to put up with it. Your choice.
My Pregnant DIL Refused to Return My Mom’s Diamond Necklace, So I Made Sure She Paid the Price

Family conflicts often surface around trust, boundaries, and inheritance, especially when sentimental items are involved. Situations like these can strain relationships, spark resentment, and force difficult decisions about respect, accountability, and long-term family dynamics.
Letter for Bright Side:
Hello, Bright Side,
Throwaway because family lurks. Also on mobile, sorry for formatting. This one’s been eating at me and I need some outside perspective.
My DIL was about 8 months pregnant a few months ago and asked if she could borrow my late mom’s diamond necklace for a maternity photoshoot. This necklace is the heirloom. My mom wore it on special occasions, and it’s one of the few things I have left of her.
I hesitated HARD. Told her it was really sentimental. She promised she’d be careful, just for the shoot, and return it right after.
Against my better judgment, I agreed. I know. That’s on me.
The photos came out beautiful, honestly. She looked great, baby bump, glowing, whole thing. I waited a bit, then asked for the necklace back. She kept brushing it off like “oh yeah, soon!” or “I’ll bring it next time we see you.”
Fast-forward to last week. I finally go over and directly ask for it. She disappears into the bedroom and comes back holding an empty jewelry box. She goes, super casual, that my necklace was lent to her sister, “Oh! I lent it to my sister for her wedding last week.”
I swear to God, my blood went ice-cold. Like, lent it? My mom’s necklace? To someone I barely know? Without asking me? As if it were hers to give away?
I didn’t cause a scene. I just smiled, said “okay,” made some excuse, and left. But inside, I was absolutely shaking. That afternoon, I called my lawyer and rewrote my will.
I removed my son and my DIL entirely. Everything now goes elsewhere. I didn’t tell them. I haven’t confronted her. I’m still waiting to see if the necklace even comes back in one piece.

Wise to rewrite your will and not tell them BUT you need to file a police report and tell her that you did. IF you get the necklace back have it appraised to be sure it's still diamonds. Your DIL is quite entitled and has boundary issues.
Part of me feels justified because the level of entitlement was honestly shocking. Another part of me wonders if I went nuclear without saying anything, and if I should’ve at least talked to my son.
So, Bright Side, am I handling it the right way? Should I confront them, or am I right to protect what’s mine and let this be my line in the sand? What would you do if you were in my shoes?
Best,
E.

Yes DIL is an inconsiderate AH but at the same time you shouldn't have loaned the necklace out. Keep the will like you have it now then call the police and take her to court if necessary. If she doesn't want a scene or the embarrassment she'll get the necklace back to you in the same condition she received it in. Good luck.
Thank you so much for sharing your story with us, we know that wasn’t easy, and it takes real courage to be that open.
- Don’t let “pregnant” become a free pass — We know she was pregnant and everyone tiptoed around that, but being 8 months along doesn’t magically erase basic respect. You’re allowed to be pissed and compassionate at the same time. If anyone tries to guilt you with “she’s hormonal,” remind yourself that hormones don’t make people loan out heirlooms that aren’t theirs.
- Don’t let this sit unspoken forever — Even if you never put them back in the will, letting this stay unaddressed will rot you from the inside. Pick a calm moment and say something like, “What hurt wasn’t just the necklace, it was that you treated it like it was yours.” You don’t need an apology tour. You just need it said out loud.
- Prepare for the fallout — If they find out about the will later, expect shock, anger, maybe even playing the victim. Decide now how much explanation you’re willing to give. You don’t owe a courtroom defense. “I made choices based on how my boundaries were treated” is enough.
Situations like these, while painful, can also become turning points for healthier boundaries and clearer communication. With time, reflection, and the right support, families can find ways to move forward with greater understanding and mutual respect.
Read next — I Let My Sister Borrow Grandma’s Ring at My Wedding—And That Was My Worst Mistake
Comments
Don't tell them about the will. Send a letter certified return receipt demanding the return of the necklace in its original condition. If DIL balks consider filing a theft report. DIL was way out of line. Next time listen to your gut.
She's pregnant and you're starting family drama? Really?
File a police report and stick to your changes. I go nuclear when my trust is violated, too.
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