I updated my listing to reflect a change in bed count, and one of the photos didn't get updated! I went from 2 twin beds to one double bed in a bedroom. Guests are wanting 2 beds in that room, and not utilize a sofa sleeper that is available. Would it be acceptable for me to add a serta single air mattress? Or do I go find a twin bed and haul in for this reservation? Thoughts? Thank you! Darla