Some secrets are worth keeping. Some are worth telling.

Ben and Ava have mastered the art of hiding in plain sight—stealing filthy moments in conference rooms, keeping their hands to themselves in meetings, pretending the electric current between them doesn’t exist. But the more they have of each other, the more they want: Ben on his knees beneath her desk, Ava bent over their boss’s chair, the kind of desperate, consuming sex that leaves marks and memories.

As office gossip swirls and family obligations loom, Ben faces a choice: continue protecting their private world, or finally let someone see what’s been written between the lines all along. But when a casual remark about Ava’s family raises unexpected questions, Ben realizes there’s more to her story than even he knows.

With a sister who sees too much, a family birthday party on the horizon, and cravings that grow more demanding by the day, Ben and Ava must decide what they’re willing to risk—and who they’re willing to become—when the truth can no longer stay hidden.

Between the Lines 4 continues the futa-on-male romance of Ben and Ava as they navigate exposure, family, and the kind of love that refuses to be categorized.