i will be honest, if its a harem, and the trap is part of it, i dont see the problem with them playing with the other girls, specially if the option is there to jump into the trap as well. while semanticaly it is sharing, i see sharing as more something with an "outsider", or another dude. for example, in WVM i dont see the GF and the (T)BF fooling around to be sharing. even when one of them does have a dick.I think ntr is when the cuck doesn't participate but I could be wrong. I would consider it sharing.