From Dust To Don by Stephanie Amaral

Watch.
Register.
Report back.
That was the assignment.
But the distance I should have kept from the fiery mafia queen I spied on every day, crumbled to ash when she followed me into enemy territory. My territory.
And whatever crossed those red tracks was mine for the taking.

From Dust to Don is a novella with open door steamy scenes and a guaranteed HEA.