That is definitely different. Kunde comes from the verb to can so it is more like ability I guess.
'familiarity with, knowledge of matters' (now mainly used as the right-hand part of compounds indicating a field of study or scientific discipline)''' and 'proficiency in a subject, science or in general'
I bet if the male escort wasn't a male escort but a caring neighbour the family would still come for money, doesn't read like the nature of their relationship is a problem. They should be grateful for the escort that their aunt had company, considering how awful loneliness is.