Is Daisy spayed? Can you prevent her from jumping on the couch by providing some sort of barrier? Or alternatively if possible spray some deterrent around the floor area (eg. lemon juice … I have used this on the corner of my lounge when my bunny was chewing the edges). Another option is put old towels on the lounge and spray them with some perfume (like some cheapie stuff). However, the smell can be overpowering not only for your bun but you too. That may help prevent her from jumping on the lounge.
I have also used the carpet protectors (the ones with those little spikey claws on them but put them up the other way). That way bunny will not like stepping on the spikey bits.
Or ban Daisy from the lounge room altogether, until she knows where to do her toilet.
Has there been any change in your household … new visitors, have you changed any thing around in the living room.
You will need to reinforce her litterbox habits again … rabbits can very easily get out of their routine, and do at times need some extra training to reinforce the good habits.
Dawn xx