The uninformed people(well at least over here, all tell me we should do strict opol(not that they know the name but they always go, like you speak only german and oh only speaks english it is the common sense thing to do(say the monolinguals. )Without even acknowledging that there are other possibilities.
My MIL was the opposite - she'd asked multiple times (as if she'd forgotten my previous response) if I speak English to them. She was surprised about it at first but then said it's good they'll know both languages. I was thinking, well of course, how else would my family understand them?