First of all for the new 3rd Stimulus payment you can both keep it.
But for your 2020 return you should not have entered the amounts she got. You should have your own 1800 on line 30 for yourself. And if you were over 17 she didn't get any Stimulus for you at all. Why did you enter what she got? That was for only for her. You may need to amend your return to claim the 1st and 2nd rounds.
