Can a master love their slave(s)?
A master would be more interested in loyalty, submission, obedience without question, and although this falls under "loyalty", I'd also venture to say that they'd be very interested in non-exposure of abuse within the master-slave dynamic. They may equate those behaviours with "love", but the "love" is a one-way street, particularly if the master denied the slaves of anything other than the basics of sustenance and shelter, while requiring obedience to the master's every whim.