Some other countries do not allow co sleeping with the new born baby up to 3 years old, this is because its dangerous and might cause of the sudden infant death (SID). Do you co sleep with your child or not?
The baby is very closely associated with the mother, so sleeping in one bed is normal. Install a large bed so that both have enough space and the problem is solved. You can add a healthy atmosphere. Your sleep will be strong and your body healthy.
There could be cases of sudden infant death as a result but the statistics is really really low. You'd barely hear cases like that. I think the mothers become really careful and sensitive at the time.
I would recommend that babies be placed really close to the parent. The crib can be just by the bed and children from 2-3 and above can do well in their own beds. Anything that would put the life of a child at risk needs to be taken seriously.