I slept in mine last night. Took it on a road trip and flew my GF home on the last leg. On a serious note we planned that…. I just didn’t want to pay a hotel, and there is more weather related issues that came up. Here I am rambling.
I was going to say how tall are you? Slide the front seats all the way forward, put luggage on the floor up behind the front seats and rumble the mid row up against the front seats (you can fit quite a bit of stuff between the rumbled up mid row and front seats). I fit a little bit sideways perfectly comfortable like that and I am 5’11”, if your significant other is around that same size or shorter it would be perfectly fine with 2.
I put my feet up on some luggage to stay level last night; but to be professional I would get a couple blow up pillows to fill in the hole under the mid seat and then put a blow up air mattress back there. Would be comfortable.