Interested in peoples views on this set up
Person A sorts all baby wakings through the night, so feeds, nappy changes, putting dummy back in etc, on average this involves being up 3-4 times through the night
Person B sorts all child wakings. Most nights there aren't any but sometimes child goes through phases of coming into bed in the night or waking crying and needs seen to. Maybe 3 times a month roughly. But child wakes early so person B is up every single morning from 6.
Person B struggles to sleep well so often wakes when baby does, doesn't have to actually do anything but is getting a disturbed sleep. Person B feels ill-done to having to get up with the child every morning while person A usually catches up on lost sleep and doesn't get up until 7.30/8am.
Person A does not feel ill-done to for doing all baby stuff, but does get annoyed at Person B for complaining about lack of sleep as technically they have the option of turning over and going back to sleep. Person A feels that if anyone is going to 'play martyr' it should be them for taking sole responsibility for the baby.
Does either party seem unreasonable for getting annoyed/feeling ill-done to in this scenario?