As has already been said, when the Murphy Bed comes down it is litterally up against the couch - there isn't even enough room to walk between the two. There is also no room to move the couch to - its not bolted down. However, one idea -and I have no idea how this would work - would be to move the dining room table and chairs out to the porch (if its raining this doesn't work because the chairs have padding on them) and move the couch over a little into the space that the dining room table and chairs took up. Just know that there is a bench at the table that can't be moved so its not as simple as just sliding the couch out a little.
But, again, the couch is short - I don't think its a love seat but it is definately not a huge couch for someone to lay out on comfortably.
Barring any knife fights between the divorcees, the Murphy Bed is actually quite large. My DH and I sleep on a full at home - any larger of a bed and we have to get separate area codes because we spread out so far - and we felt like we were on a King sized bed when we slept on the Murphy bed. So you can get your own space on it - but they would be in the same bed all the same.