Master gave Tapeti a collar over the weekend - a cute pink one with silver threading. It didn't come with any stipulations; she isn't beholden to him or me at all, and she can wear it (or not wear it) as she pleases. She was mighty pleased with it!
However, I got the impression that Lupa was a little sad that she did not get a collar. She has known Master and me longer than Tapeti has, but it's harder for us to feel... relationship-y towards her. I think it's for a couple reasons.
While Tapeti is a hardcore sub/bottom, Lupa is a super-switch, and neither Master nor I know quite what to make of that. Though sometimes I can be a little bit of a brat towards Master, and though I do like to assert myself over other people, switching roles frequently - sometimes multiple times in the same scene, as Lupa does - just confuses me. It's hard for me to completely reorient my headspace at the drop of a hat; it reminds me of one time when I was asked to play two of my characters - mother and son - at the same time in a tabletop game. Trying to hop between two mindsets was too much for me, and eventually I needed the GM to take over one of them. (As an aside, I think that's why I'm not a very successful GM, too.)
So I don't know where I stand with Lupa - is she dominant over me? She often co-tops with Master, and finds great glee in tormenting me. I'm more sexually experienced than her, though, and that leads to me often taking the initiative with her and "leading" the encounter - not to mention that she is incredibly physically sensitive, so it's pretty easy for me to subdue her with a few bites and caresses. But, on the other hand, she gets cranky if she doesn't get the opportunity to tie someone up! I can only imagine how difficult it is for Master to get a bead on her.
Tapeti, by comparison, is pretty straightforward. She is submissive. Very, very submissive. Much more so than I am, so by default I'm above her in the "pecking order" of our little kinky menagerie. The chain of command is clear: Master > Me > Tapeti. With everything so clear-cut, it's easier for us to integrate her into our relationship.
I'd feel worse for Lupa, except that she's explicitly told me that she prefers being able to act as she pleases, without the ties of an official "relationship." She definitely values her independence; I don't think she's been in a monogamous relationship her entire life.
It's funny - for a wolf, Lupa sure resists clear-cut hierarchies. She sure is an odd one. But I love her anyways.