
Oh you sound like me with my last litter!! I am on my own and also had the pen i n the sitting room....I wouldn't say that they took over exactly ,but the sires owner told someone that I live with the dogs, not they live with me!!!!
I was quite lucky in that Flossie kept her babies clean etc and I had very little to do...until weaning when I extended the pen to the entire length of the room for them - you can see what the sires owner meant now can't you LOL - but once I made the far end of the pen into a toilet area for them, which they took to brilliantly, I was forever in there cleaning the poos before they trod it all back to the other end!!!
Anyway, this time I am having the whelping bed in the computer room here with me and it's right next to my bedroom where I can be on call if Flossie needs me during the night. I live in a bungalow which makes things much easier. Once they are weaned and on the move, I shall move the whelping bed into the kitchen where there are tiled floors, much easier to keep clean and I have had a patio built for them to play outside on, fenced in by puppy panels. This will (hopefully) assist in toilet training and let them exercise to build up their muscles in their back legs. They will be confined to the kitchen and the utility corridor which is also tiled, and that leads out to the patio.
Of course, we've all heard the one about the best laid plans of mice and men.....