You are to be congratulated for getting a set bloodstain out of any fabric, let alone anything so blatantly obvious as a white couch cushion.
Always willing to play devil's advocate - in your place, I would have gone into the fridge and retrieved whatever frozen meat I could find. Hopefully, there was a family dog that could be convinced to gnaw and rend the "evidence" sufficiently to be convincing, and then as Fido's appetite slackened, the remnants placed on the offending stain.
After the chastising of the innocent but conveniently mute scapegoat,
Everyone in the household would have suspected everyone else for being responsible for the oversight of having left the meat out of the freezer "to thaw", and set up a smokescreen of befuddlement until you could complete your evanescence.
In the absence of Fido or Fifi as a modus operandi, the stained cushion might simply "disappear".
As for your clothing, you might simply have "toughed it out" until you could make good your escape. This would have had to have been rather sooner than later, as your aroma would have been rather compelling attestation to further conjecture the true meaning of a missing cushion or Fido's inexplicable and unrepeatable dexterity to open the fridge door............
I sound like a great houseguest, don't I?
He sounds like a great boyfriend to help you clean up a period stain and find you a pad or a tampon. Don't lose him. Dani