Well, let's just say, that there are some things we don't talk about to others, we keep a few things to ourselves. XD
That, and I am not sure that even they are 100% certain where they stand, and where they want things to go, for now, they are just having fun, and not worrying about labels or what people think. Thanks to Claudia, Lyanna is exploring a whole new aspect of life, and she is not interested in being 'tied-down' (figuratively speaking), or put in a box (also figuratively speaking).
We also don't always want to give the impressions of 'being taken', otherwise people might be less inclined to join us for fun. There are a number of people who don't understand/like same sex parings as well, and sometimes, you just don't want to deal with them.