Dead honest. I mean a quick async-okay-if-from-phone "hey, here's what I have lined up for this week, can you tell me if this is unreasonable from your perspective" exchange.
On Sunday? Not happening. Ever. Weekends are off limits, particularly since having kids. Man, I hate meetings enough during the work week, and you wanna have one on the weekend? Even if it's short, or over the phone, or via email, or slack, or whatever, it's still a work intrusion. I personally think the weekend should be four days a week, and damn near sacred.