Here's a theory that makes sense...
Someone from Dad's, who was invited back to the house to "party", showed up just after the pizza people left.
Damon/Brenda/3rd person "swing" in MB and fall asleep after the "session".
3rd person wakes and takes Danielle.
Mystery solved.
First I heard that brenda was inviting strangers friday night into the home for swinging purposes, then we heard it was barbara and denises and not brenda. That brenda had no knowledge of it. THEN we learn that only friends came to the house for about 25 minutes or so for leftover pizza.... even though we'd been told for months that they were swinging in the locked garage w/drug dealers and strangers. Then he hear from teh defense side taht all 6 are lying..so what are we to believe?