I think maybe she is worried he will be sharing too much private info. But, I understand, my husband and I respect privacy, but we talk a lot. It's like the way best friends talk about feelings of excitement or nervousness, etc. My boyfriend doesn't mind what I share. He actually likes it if I share sex details with my husband. It's just a personality type. Other people wouldn't, and I would respect that. I wouldn't worry too much about this. Probably just a different approach. And it will all work itself out. Even when there is jealousy it doesn't have to impact your relationship. My boyfriend is very independent and does what he wants. I experienced jealousy from his primary girlfriend. I was confused if somehow I did something to provoke it. But, my husband was dating a woman, and her husband had dated my boyfriend's girlfriend's husband's girlfriend (lol), and she said that my boyfriend's girlfriend also had jealousy with her husband's girlfriend and commented that perhaps she isn't quite so well suited to this poly lifestyle. But, any way, it doesn't have to cause problems for anyone. If someone feels jealousy it means they don't get close to their metamours and they just have feelings to work with and deal with. I'm sure it comes and goes, and isn't constant.