His Instant Heir by Katherine Garbera

In her Baby Business trilogy, USA TODAY bestselling author Katherine Garbera starts with just one night...

Cari Chandler can't forget Declan Montrose. Their baby is a living reminder. The baby she hasn't told him about. The no-commitment billionaire--and her family's sworn enemy--walked out of her life the morning after. But now he's back...with a vengeance!

Taking over her company is the last step to victory in their families' long feud. But Cari's more than collateral damage to Dec. He wants--needs--to seduce her again and again. Until he finds out she's hidden something more precious than her company. His son. And Dec intends to claim him...no matter the cost.