@hawkeye10,
Your cynicism is rather welcomed, because it's helping me gain perspective, however I'd just like to point out that there's no apparent manipulation or conniving happening. I'm unfortunately privy to that experience, and I don't think I'm so blinded by love to not see it here.
I'm just uncomfortable with buddy.
I'll have to consider what I know of her past, of relationships in the interim. We certainly did rush into things, but I have no regrets regarding that, and neither does she. We were both kinda jaded but optimistic when we found each other, looking for someone to love and be with; looking for "the one".
I don't fear any *real* issues with the ex, outside of my general discomfort with him being there.
He's like a bee in the living room; nothing malicious or underhanded going on, but I just want him the **** out.