You dh needs to step up here and be firm with your (his and yours) wishes that she not stay. If she's going to be difficult about it and you already have the support of your mum then it might sound harsh but I'd not tell the MIL when the c/s is scheduled for, give her a date a week after or so.
You can lift your baby but that's the guide - not to lift anything heavier than him/her. Driving is common sense, you might be able to drive but do you feel safe doing so. My dr said a few weeks if you drive a automatic but longer if it's manual. Just be prepared that you'll probably have less energy than you're used to after natural births, as common as they've become they are still major surgery.
You can lift your baby but that's the guide - not to lift anything heavier than him/her. Driving is common sense, you might be able to drive but do you feel safe doing so. My dr said a few weeks if you drive a automatic but longer if it's manual. Just be prepared that you'll probably have less energy than you're used to after natural births, as common as they've become they are still major surgery.