When to schedule repeat c-section?

My due date is 9th july. Baby is measuring a week ahead. Husband thinks we should do it 25th june. Is this too early? I would be 38 weeks.

My first was born with 11 pounds on 25th june at 39+2.

I got a csection due to baby size and already they suspect this baby will be big too.

I would prefer birthdays at least a week apart but not days, in which case same day would be better than just days apart. My ideal situation would be i got into labour naturally then have a csection but i doubt they will let me go without a scheduled appointment as they want to avoid emergency c-section. Only way i can get that is if i try vbac but i already know my pelvis is too small for the big babies. Last labour lasted 3 days so if this baby is same size, i know i would still have time to get a csection as my labours progress slowly because baby just fails to sink. But with covid i really doubt they would gumble with when the c-section should take place.

Guess am hoping you guys suggest dates you think would be good and why. Especially in regard to the fetus and shared birthdays. Thanks