Lisa only got as good as she gave. I'm intrigued as to why you think she was handed a "poison chalice" all the same. She had the same warnings, the same chance to turn down the experience, the same 'everything' that we all had.
Regarding the "windpipe" comment, as you rightly say, it was withdrawn immediately and anyone who watched could plainly see that it was a humourous reference to her own comments about choking, not an out-and-out threat.
Being human, I fail - and I have never been one to cover up that fact. I also explained in the diary room that I didn't feel, as a Christian, that my behaviour at times had been a good example to others.
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I'm sorry to say it's FAR TOO LONG since I spoke to Steph! And sadly, I've never been to visit her yet. In the house we were very good friends, nothing more than that.