I am pregnant and have three stepchildren (SD8, SD7 and SS5). SO and I live in a three-bedroom house, with an additional reception room downstairs used as a home office at the moment. At some point in the next 2-3 years we’re hoping to remodel and add another bedroom upstairs, but this isn’t an immediate priority right now.
IABU - baby will have to stay in your bedroom then move into the downstairs office (this is SO’s opinion)
IANBU - girls will have to move downstairs and baby into upstairs bedroom (this is my opinion)