@Hrpuffnstuff1. Does Mrs hr have to share my mental load too?
Do you deal with nursery or school stuff, remember school events, plan holiday childcare, organise emergency childcare for sick children, organise presents for parties, buy your children's birthday and Christmas gifts, buy gifts and cards for teachers, liaise with other parents on the school Whatsapp, organise playdates, sort out doctor and dentists' appointments, meal plan, shop, manage household chores, pack nursery and school backpacks, remember reading books, supervise homework, plan and book holidays, check that you haven't run out of household essentials, and so on?
Are you 'default' in your household so you do all of these things without anyone else having to remind you?
If so, then you should absolutely be asking your partner to step up and share your mental load. Because those are things you do for both of you to keep your joint household running smoothly.