To add to what TurquoiseDress said about the strain this is very likely to put on your marriage if your mother does things her way and is in your small flat all day every day for the first two weeks of your baby's life - this could well also the last straw and tipping point for your already strained relationship with your mother, and if he takes her side also destroy your currently fairly good relationship with your father.
After my second child was born I allowed myself to be emotionally blackmailed into having my mother to stay. We haven't lived in the same house for more than a week since a couple of weeks after my 18th birthday and I knew deep down it was a terrible idea, but father put the pressure on saying how much it would mean to her to "help" and I stupidly listened to all those people who say "accept any and all help after your second is born if you have a toddler" despite actually not being particularly worried about having a newborn and a toddler...
The two weeks my mother spent monopolising my breast fed baby, expecting to hold him all the time and expecting me to be grateful that (immediately post c-section) I "had my hands free" to cook and clean pretty much destroyed a relationship which was largely OK due to distance.
She expected me to do a deep clean and was incredibly poisonous in her judgemental language when criticising my unwashed floor, and my "heavy" cooking (I'm not sure she's washed a floor in the last 30 years as she has had a cleaner who does absolutely all her housework and ironing for decades, and she is obsessed with women's weight and food intake).
She didn't lift a finger and expected me to wait on her while she sat in my breastfeeding chair monopolising my newborn, aside from the solid hour every morning when she monopolised our only bathroom and then swanned down in her dressing gown expecting breakfast and complaining about cereal, as if she was in a hotel.
After a few days I snapped and told her I hadn't had a baby because I didn't want one - my aim in life wasn't to palm off my newborn all day and do a deep clean and cook and make her coffee and tea to her liking a week after abdominal surgery and while establishing breastfeeding, what I actually wanted was my baby back and for her to play with the toddler and help around the house - as she'd said she was coming to help.
She cried and cried and said she'd come to bond with the baby. The next day I asked her to look after the toddler. She agreed, I thought maybe we'd turned a corner - she let the toddler trash the room then said she'd tidy it if I took the toddler out. I took the toddler out. She tidied by pouring everything into utterly random drawers - a few puzzle pieces in with the duplo, a few pieces from the same puzzle in with the toy cars, the rest in the soft toy basket, half a dressing up costume in the dressing up box, the other half of the same costume in with the soft toys... everything just shoved out of sight randomly, the way a 3 year old might "tidy" unsupervised.
Then she insisted on coming to toddlers group with me and held forth to a circle of polite mums waiting to sing the welcome song about how I'd never have coped without her there to tidy up after me, cue their polite expected praise of her and how lucky I was to have my mum staying...
She demanded to be driven about to shop for a new jacket - for herself - because she'd not packed quite the right things. She criticised everything - my friends, my housekeeping, my parenting, my cooking.
By the end of the two weeks I hated her.
That baby is in secondary school now and to be frank I've never really forgiven her.
When the third was born I was very clear that she and my father would come to visit several weeks after the baby's birth and stay in a hotel.
Being alone with 2 preschoolers and a newborn was many, many, many times easier and less stressful than having my mother staying after DC2 was born. Honestly even if I'd had twins or triplets I'd have chosen to manage alone rather than have her stay, she raised my blood pressure and stress levels to such an extent.