It's a lie in one...
We have two small DCs, 6 months and nearly 3 years. They are both pretty solid sleepers but early risers and baby still has an early bottle
I'll set out the stall now that DH is a pretty hands on parent: does meal times, nappies, takes them out at the weekend on occasion so I can have solo time, cooks, cleans up, does bedtimes etc etc (I should add all of this list we share, he doesn't do it all the time). The only thing he doesn't do is overnights with the baby as he's working and I'm on maternity leave. I'm happy with this as baby rarely wakes through the night and he deals with toddler if he wakes
Now to the issue: DH works from home and has an office set upstairs. He can, and often will, roll out of bed, shower, dress, grab a coffee and log in so can be asleep at 8.45 and online at 9.
In the week I wake up when the baby does around 5am. I can usually get the baby back to sleep with a bottle but it takes an hour. Baby will then sleep til 8 BUT toddler then wakes around 6ish. He'll play happily upstairs in our room but with interaction and usually wants breakfast at 7.30. Then up, dress and take him to nursery with baby in tow at 8.20
I see the weekdays as DH having a lie in most days and me often being awake for the day from 5. I therefore want both lie ins at the weekend (we're talking 9am max). DH argues the weekend lie ins should be split as I can nap in the day during the week when the baby sleeps and he needs to extra weekday sleep as is working and often late to bed (not working, watching films).
For those who've been on mat leave, you'll know that in reality, when baby sleeps you usually clear up any mess from playing, put a load of washing on etc etc
YABU: Lies ins should be shared over the weekend
YANBU: You should get all the lie ins!