Picture the night before the title happens. A pack house, late. Seraphina has been Alpha Kieran's wife for ten years and has never once been called Luna. There's no mark on her neck. She was born without a wolf, got pregnant after one drunk night, got married because of it, and the pack has treated the arrangement as a mistake it was forced to live with. Then her sister comes home. Kieran files for divorce that night, and the family, per the blurb, is glad. That's where My Sister Stole My Mate, And I Let Her starts, and the last three words are what readers argue about.
It's a werewolf serial by an author writing as regalsoul. NanoReads doesn't host it; here's who's in it, where it lives, and what we have that's close.
The three people in the title
The narrator who let her
Seraphina. Wolfless, which in this genre means bottom of the hierarchy with no way up. Ten years of cold sheets and colder stares, in the blurb's words. She doesn't fight the divorce, and whether that's defeat or her first smart move is the question the book runs on.
The mate
Kieran, the Alpha. Married her because of the pregnancy, never marked her, never gave her the title. Not written as a misunderstood grump: chapter 9 on WebNovel is called "Sadistic Bastard."
The sister
The blurb calls her "perfect" and doesn't name her, so we won't guess. She returns and the marriage ends that night. Most sister-betrayal serials keep the sister as villain for the whole run; this title hands her the mate in act one and moves on.
The fourth name
Lucian. AlphaNovel reviewers describe him as a wealthy CEO whose company helps wolfless werewolves, the man who picks Seraphina up after an attack. The blurb doesn't mention him, so treat this as a lead rather than a verified beat.
What we could verify, and what's disputed
- Author
- regalsoul (also styled Regal Soul). Same name on every listing we found.
- Where
- WebNovel and MoboReader carry it chapter by chapter; NovelCat and AnyStories list it too. Book 1 is also sold as a Kindle ebook on Amazon.
- Length
- Around 249 chapters when we checked in September 2026, marked ongoing on WebNovel with roughly daily updates.
- Status
- Disputed. WebNovel says ongoing. AlphaNovel's review page lists it as complete, and reviewers there complain it "finished in the middle of things." Our read: the platform copies are at different points.
- On NanoReads?
- No. The five serials below are ours; this one isn't.
Paywalled mid-chapter on one of those apps? The Galatea alternatives page explains the coin model.
Why "and I let her" is the whole pitch
Most stolen-mate serials are built on resistance: the heroine screams, the pack watches, the alpha is cruel in public, and the revenge runs on that humiliation. This title removes the scream. A wolfless woman has no bond to fight for and no rank to defend, so letting the sister take Kieran costs her nothing she still wanted. The book asks you to read a divorce as an escape, the same engine as a billionaire ex-wife comeback moved into a pack house. The Ex-Wife's Billion Dollar Comeback is the boardroom version.
Wolflessness matters too. In werewolf romance a heroine without a wolf can't be rejected through the bond, because there isn't one, so the story has to hurt her socially instead, through the missing title and the family that celebrates the split. Chasing His Wolfless Luna Back uses the same condition from the alpha's side.
Heat, and what the listings don't say
🌶️🌶️🌶️🌶️🌶️Unrated by every listing we found; we won't guess a number
Implied by the blurb and chapter list
- A pregnancy from a drunken night, then a ten-year loveless marriage, then divorce and a family that sides against the heroine.
- An attack on Seraphina early on (from reviews, not the blurb).
- Not verified: how explicit the scenes are, whether Kieran is redeemed, who the endgame is. The spice checker grades any of the five books below.
Which reader are you?
You need to watch the betrayal cost her.
Start with No. 1 → You wantHe said "just business" and you want a book of consequences.
Start with No. 2 → You wantYou want a sister plot where the bond holds.
Start with No. 3 → You wantLucian was your favourite part: the one who shows up after the alpha fails.
Start with No. 4 or 5 →Five betrayal serials, free from chapter one
All 26 wolf serials →We checked: none of our 26 werewolf serials has a sister stealing a mate. One book in the whole catalog does, and it's a billionaire romance, so it goes first.
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The Five Star Betrayal
Chloe Beaumont runs her husband Richard's hotel empire and finds him in a service corridor with her pregnant younger sister Isabella. He tells her the marriage "was just business" and throws her out at an awards gala; a rival billionaire offers a way back. The sister plot with wolves swapped for hotels.
Read chapter 1 free → -
That Wolf I Used To Own
An omega secretary vanishes from Alpha Marcus Vance's company and comes back as Nadia Volkov, CEO, to take his next deal. Closest to Seraphina's arc: the lowest wolf in the room leaves quietly and returns with leverage. Marcus responds with obsession rather than remorse; read the abusive tag first.
Open the first chapter → -
Bonds of Fire and Ice
The antidote pick. Princess Zayla's twin Bella is kidnapped into the Shadow Realm and their mother, the queen, refuses to help, so Zayla goes alone. A sister worth defying a crown for, plus a fated-mate thread for Bella in captivity. Less romance than the rest, heat off the page.
Start reading free → -
Bound to Our Enemy
Lena Volkov's fated mates are the twin heirs of the pack that killed her kin, and loyalty says reject them. Our most-read wolf serial, and the pick if what you wanted from Seraphina's story was the moment a new alpha looks at her and the old one stops mattering.
Read chapter 1 free → -
My Ex-Alpha's Obsession
Maya Reyes left Kaelen Volkov seven years ago; a snowstorm crash puts her back in his cabin and his first word is "Mine." The dark version of "I let her": she walked out and the book is him refusing to accept it counted. No grovelling in it; see the dark romance primer if that distinction is new.
Try the first chapter →
Straight answers
Is My Sister Stole My Mate and I Let Her free to read? The first chapters are free on WebNovel and MoboReader; the rest cost app coins or a subscription. The Kindle edition is a paid ebook. It isn't on NanoReads.
Is it finished? Depends who you ask: WebNovel says ongoing at around 249 chapters, one review site says complete with an abrupt ending. For a rejected-wife wolf serial that's properly done, see The Alpha's Unwanted Luna.
What next? The public-rejection version of this setup is His Rejected Mate's Revenge. The paranormal love stories list has the wolves with less pack politics, and the second chance hub has forgiven-husband endings if you're hoping Kieran earns one.