I'm a little confused. Is this a biological sister or a religous sister? If it's a religious sister, then she is a little nuts and has the hots for you. Alot of women absolutely adore gay men, and "if only they were straight" they say! If it's a biological sister, then she's a mess in her mind, loves you immensly, and really beleives the WTS bullhocky. The WTS is whoopping up the fear factor right now.
Either way, you said that she "was in a bit of a mess . . " and then, immediately, began spewing her religion on you. I've seen that too. When the followers are in the worst mental shape, that's when they go all out preaching to you. It's as if they are unsure/unsettled themselves, and find some assurance and safety by changing the subject to their religion. Yes, it's emotional. It's becuase they were in an emotional state when they were "in a bit of a mess", but couldn't vocalize it. Now, given the religion's arguments and training, they can vocalize their emotions. And, by talking about religion, they get to a better mental state. I think her saying that you're going to not be in Jehovah's favor becuase you are disfellowshipped, gay, whatever . . . she is reassuring herself that she is in Jehovah's favor. And, she's doubly in Jehovah's favor becuase she's trying to convert you back. Now, she doesn't have to go back to face why she "was in a bit of a mess". The reliigon is her coping mechanism to something alot deeper. Plus, she put ALL of her internal guilt that was making her uncomfortable onto YOU. So, she probably was on a high when she left. Because, normal people don't act that way.
Next time it happens, assure her that she's a wonderful person and Jehovah God, if there is one, would definately put her in the best spot. He would be a fool to not see that. Say it once, and she likely won't go religious postal on you again. If she comes back with 'you're not doing x", then you can counter with: 1) she's judging and 2) God judges from within. If she comes back again on you about religion, tell her to see a shrink. She's using you as a guilt trip snot rag for her own validiation.
Skeeter
p.s. I've also routinely see JW relatives complain, complain, complain about the Kingdom Hall, WTS, treatment by other followers, etc. They will complain directly to me. And, whether i nod or change the subject or disagree, they follow their complaints with PREACHING to me about how wonderful the Borganization is! Then afterwards, they are so happy with themselves and the Organization. Their preaching, was really to themselves. Now, they are at peace, content, and ready to study their materials for the next meeting. Meanwhile, I'm like, silently, "This dude's elevator skips a few floors."
p.s.s. Being gay isn't a sin. If it was, then Jesus would have addressed it. Becuase, it was going on then.