<human>: Give me a shortened version of the text

So my sister came to me a couple of months ago and asked if she could talk to me about something. For years she has denied that bisexuality exists (which hurt my feelings a lot, because I am) but now she says she believes it exists because she is attracted to a friend of hers.

This would be fine and I would encourage her to explore that but the woman in question is happily married. My sister told me that they kissed once briefly but never talked about it. She is not interested in having any relationship with the man at all and she is not even sure if she knows that she would like going beyond kissing.

She keeps hanging out with this woman at work and on the weekends and texting ALL THE TIME. I feel like she will never get over her if she does not get some time away. I want to approach the topic carefully because she can be a little sensitive and interpret any criticism as an attack.
<bot>: Generally hetero sister keeps hanging around married woman she is attracted to and need advice on how to approach her about it.