I've checked a bunch of places and found a few solid, reader-friendly routes to find 'Torn Between The Carter Brothers'. First off, check major ebook stores like Amazon Kindle, Apple Books, Google Play Books, Kobo, and Barnes & Noble — authors often publish there, and Kindle Unlimited sometimes carries serialized romance titles if the author enrolls. If the book is indie-published, the author might sell direct from their website or through Gumroad or Payhip, which is worth a search.
If you prefer library access, try Libby/OverDrive or Hoopla through your local library card. Those apps regularly add indie and mainstream ebooks, and interlibrary loan is a surprisingly good option if your library doesn’t have it yet. Also scan Wattpad, FanFiction.net, and Archive of Our Own if it turns out to be fanfiction-style or self-serialized; many romance authors serialize work on Wattpad before formal publication. Keep an eye out for piracy sites — avoid unofficial uploads and support the creator when possible. Happy hunting; I love the thrill of tracking down a favorite read, and this one sounds like a fun ride.