Maybe she had a healthy start to pregnancy, but at the end has had a complication.
Maybe she is moving soon into a ground floor or a house.
Maybe she has injured herself and has been told to take it easy and not lift anything heavy for x amount of time.
She might use a sling for the first couple of months if she needs to recover, or maybe she will be using paid help, or perhaps she is a surrogate and won't need to be haulling a buggy up and down, or she might get a lightweight pram, or her hallway may have storage space for it,,,,,, endless possibilities there TheSockPuppet
These things don't matter, the fact is that her shopping should of been delivered to her address, her front door, not the communal hallway entrance.
She has paid for a service, and hasn't recieved it, pregnant or not.