When She’s Married by Ruby Dixon

Escaped convict Vordigar has been hiding out on Risda III. When he’s scooped up by law enforcement, he has two choices – he can be shipped back to the Haven prison system, or he can marry one of the locals. Piper is from an alien race called ‘humans’ and she needs a mate to help her protect her farm from aggressive neighbors.
Vordigar’s not interested in forever. Or marrying. Or settling down. He’ll go along with Piper’s plans just until he can get off planet…or so he thinks.
Because one night in Piper’s bed changes everything.