Is this a thing specifically about what happens when you come home? If so you might want to think about role shifting and how that is working for both of you - you have had time on the trip home from work to mentally make the shift from your working role to your home role, but she is going instantly from her role of mother to partner and might need more time to mentally make that shift. Talk to her about what she thinks about it, but it might work better for you both if you start a routine along the lines of you taking tiniest for a while to give her some time alone to just regather her thoughts and prepare to be “partner” and not just “mother” - maybe take a shower, go for a walk, whatever works for her.