Okay, it's sticking. Kitten's name is Moko. Here's how we ended up introducing them, after about a week of sequestering Moko in the bedroom I put a baby gate across the doorway and opened the door. Didn't work so well because Moko just kept scaling it and climbing over. So the next day we just brought her into the fold. Hazel was pretty cool about it. Not freaked because she knew there was a kitten on the scene and actually seems sort of into her. They wrestle a lot but no one is getting hurt. Hazel is totally fine with Moko sleeping on her chair and on top of/under her. So they seem acclimated. I hope they'll be buddies. I'm so glad we did this. I think Hazel was definitely lonely for some kitty camaderie.