"Is that your friend's underwear on the table?"

Daughter: Yes
Me: So she just left without her underwear?
Daughter: Yes
Me: But...why?
Daughter: I don't know.
Me: So...
Daughter: Oh, maybe she was wearing mine.
Me: Oh. (naturally.....)

Okay, not a big deal - these girls often switch clothes, dress up, etc. whenever they get together so it's not unusual for random articles of clothing to be left behind. What would be unusual is this:

Hubby: Is that your friend's underwear on the table?
Me: Yes
Hubby: So she just left without her underwear?
Me: Yes
Hubby: But...why?
Me: I don't know.
Hubby: So...
Me: Oh, maybe she was wearing mine.

Now that would cause some concern for all parties involved, huh?