There is something about a taboo romance book that just gets me. Everyone has their different thoughts on what makes a romance book Taboo. I consider taboo to be beyond a forbidden romance, something that would be scandalizing like a priest or your step-sibling or step-parent for example. Please note none of thse books have actual incest and you should for sure check the trigger warnings before reading any of these. These are the books I consider the best taboo romance books. And if you love taboo romance too throw some recommendations in the comments.
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Sabotage by Shantel Tessier
Standalone
Step-brother
Steam Level: ?????
Available on Kindle Unlimited
Lords of Pain by Angel Lawson and Samantha Rue
Completed Series
Step-brother
Steam Level: ????
Available on Kindle Unlimited
Love Unexpected by Q.B. Tyler
Standalone
Step-father
Steam Level: ????
Available on Kindle Unlimited