If I was in your shoes, I would have to remind myself to think well before I spoke. You know that she is "thinking" about things and there is a chance she could end up telling you anything. She wants to split, she wants to stay together, etc...Just make sure you don't react to what she says. Think about what she says first, let it sink in, try to understand her point. Then react to your thoughts and speak if you need to. You might already be good at this. Either way, it will help you take the high ground and not sink down if you get crappy news.

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Sniff first, then scratch.