I think I am going to ask her about these little drops of blood, too. It worries me that she's so distracted, she doesn't notice them, just folds the paper into thirds and sends the message on. The drops probably look bigger than they originally were, because they get spread out when she folds the paper. And they're always on the left side, too. Slow-velocity drops, with tails leading off to the left.
I really don't like the picture this is forming in my mind. It makes me almost wish I wasn't so interested in forensics. She's been wearing long sleeves, lately; I haven't seen her in the black, sleeveless dress in a while.
But why? Maybe she'll tell me tomorrow night, once she gets drunk enough, as it seems she's unwilling to tell me while she's sober.