Tchootnika, it's ok, no offence taken. She's a good mum, there's no reason to take dgs away from her, so she'd retain residence, or primary-carer status, or whatever.
Equally, DS is a good dad, there's no reason to reduce/deny contact; but ironically, should he have to go to court, he's likely to end up with "every other weekend and a midweek visit" as is standard in Scotland.
Which is a lot less than he has now.
So, no lawyers, no court; dance to her tune and keep smiling.