1) Commercial crime 
Sweethearting is a term used in the retail loss prevention industry to mean intentional margin loss through employee theft at the cash register. Sweethearting is the most common type of employee theft. Sweethearting is unauthorized giving-away of merchandise without charge to a `sweetheart` customer (friend, family, fellow employee) by the fake .....
• (n.) Making love.
A form of theft, whereby a cashier gives illegal discounts to employees, friends, and/or customers. 
Sweet'heart`ing noun Making love. 'To play at sweethearting .' W. Black.