[quote=@Lord Wraith]
<Snipped quote by Tyler>

I want to give BD the chance to come back if she can down the road since she PM'd me the situation. So maybe just have her shrug off the game and having had left the scene. 
[/quote]

I get that. But to me it makes more sense to retcon her, since she hasn't really had any impact at all on any of the characters yet. Much easier to reintroduce Christine as a "new" character than have to work around her disappearing. But it's up to you and the rest of the group.