It depends on your level of insulin resistance. For example, I can typically tolerate 25 g of carbohydrates in all forms in a meal if I want to keep my current level of insulin resistance stable. If I want insulin resistance to drop, I need to keep BG spikes to a minimum which means less than 25 g of carbs.

To keep insulin resistance at bay, you don't want your BG level to spike more than about 50 - 75 mg/dl 1 hour after your meal.

Intermittent fasting also helps bring down insulin resistance but depending on your families relation to snacking in the evening that can be a hard path to follow as well.