Xrysalida
I tend to go with Nisaba's interpretation,
All the times 10 of cups had come for relationships was to point that things stay comfortable, as they are, no action, no effort amd everybody lives happily ever after this way, looks a lot with 4 of cups but in this case the effort is not given, because the person or persons are already satisfied as they are and not because they wait for something or they are bored.
Also the expectations of a perfect relationship, a prototype in mind could block the relationship from growing, as it doesn't leave space for creativity and freedom and births dissatisfaction and all the others that follow.
All the times 10 of cups had come for relationships was to point that things stay comfortable, as they are, no action, no effort amd everybody lives happily ever after this way, looks a lot with 4 of cups but in this case the effort is not given, because the person or persons are already satisfied as they are and not because they wait for something or they are bored.
Also the expectations of a perfect relationship, a prototype in mind could block the relationship from growing, as it doesn't leave space for creativity and freedom and births dissatisfaction and all the others that follow.