People being negative about the size of my house when I’m about to have my 2nd baby

Me and my boyfriend live in a 2 bedroom house, he moved in last year. I have an 8 year old boy and I’m 6 weeks pregnant. The pregnancy was planned and we’ve discussed and measured where everything will go such as the cot , baby stuff etc.

Recently we’ve had my youngest sister and someone else suggest that before the baby is here that we try to move which financially we would be worse off every month doing as the bills and rent would be increased nearly double. Our living arrangements work for us and we’ve asked my son countless times if he minds sharing a bedroom and he’s always said no and expressed how much he’s looking forward to it.

Initially the baby will sleep in our bedroom and later on the baby will then share a room with my son, when the baby gets even older we’ve said they would have bunk beds so they have more space in the room generally for other things if they want it such as a desk etc. the room isn’t overly massive but it isn’t stupidly small either, we can definitely work with the space we have and I’m here trying not to take it personally when someone tries to express their concern or give an opinion on the size of the house.

I must admit my youngest sister is the one who is currently 6 months pregnant and said me and my boyfriend should WAIT a year before having a baby ( so she has attention on her own child ) and the other person is a member of my boyfriends family who has tried from the start of our relationship to convince us to move 5 hours away so we are closer to his family which again, we can’t do, our jobs and life is here.

I get that people here will also have their own opinion on the age difference between the children and we don’t plan on living in this house forever of course but it doesn’t mean we have to have this sudden urgency or stress to move house within the next few months / couple of years.

What’s your opinion on it ?