Wife for a While — Donna Clayton

Desperate Bachelor
Ben Danvers was about to lose everything -- unless he was married within the next few weeks. The terms of his grandfather's will were outrageous -- but airtight. Ben had just about given up hope when the last woman he ever expected to wed made a startling proposal.

Bargaining Bride
Chelsea Carson struck a deal Ben couldn't refuse: He could keep his beloved farm if he, would give her a baby. No strings attached, no messy emotions when it was over. Their makeshift marriage would be perfect -- unless Chelsea fell in love with her temporary husband...

---- republished by Donna Fasano as "His Wife for a While"