Anonymous wrote:But can anyone answer the question?
Only your cousin and her wife can answer. It’s not clear whether they are staying together because they love each other in a way that transcends normal sexual preference (or some other reason) or whether they are staying together in part because each fits the other’s sexual preference. In other words, it’s not clear whether, if they weren’t together, each would be drawn to the same sex or not. But the bigger point is that it doesn’t matter and you don’t need to know.