How will I sleep when Grandma goes home?

So, we've figured out a little night time routine that is working well. Not sure how it's gonna work when Grandma goes home, but we'll worry about that later. She is only content sleeping in her bouncy seat or in someone's arms. So, what we've been doing is after her first feeding of the night...usually around 9:30 or 10....she will get swaddled up and put in her bouncy seat. She gets to stay downstairs next to the couch where Grandma is sleeping:) She's actually been doing pretty good about sleeping roughly 3 hrs, but if she does wake up....she has Grandma right there to hold her and she usually goes right back to sleep and sleeps on Grandma's chest. We have about 2 shifts like that and then the past couple mornings after her 5:30-6:30 am feeding I've brought her up to my room and she lays on Chad's side of the bed since he has to get up around then. She is just as happy as can be laying beside me in bed and will sleep for hours. It's not a good habit...but our dr. has assured us that the first month for a newborn is just about "getting through" and to not worry too much about creating bad habits and just try to do whatever it takes for everyone to get some sleep. So, right now she's getting tons of snuggle time with Grandma and she loves it!