A horrible situation for you my heart goes out to you.
My first daughter dued aged 7 weeks,
I couldnt cope with anyone elses needs at the time, both mum and MIL had recently lost husbands and wanted comfort.
Iam sorry to say I withdrew from them, as a nanny now I realise how hurt they must have been.
Please if you can find a trusted friend to offload to please do and just be there when you can, and give your daughter space to think about being a mum with empty arms and nit knowing which way is up, a supportive partner is wonderful but it dosent fill the void, or the rush of milk hearing a baby cry, and explaining when people ask where is your baby.
I feel for you both and send live and hugs