There’s a big difference between lucky and fortunate. Luck is a winning lottery ticket blowing in your window. Fortunate means that you’ve taken the initiative and done something. And because of it, there was a positive outcome. So I would probably say that I was lucky because my mother was a good cook but it’s debatable whether I am lucky, or fortunate, because my partner is a good cook as well.
Before dinner a few weeks ago, I’d grilled off some vegetable beforehand and left them in a plat à four (baking dish) on the counter, ready for dinner. Right before we were to eat, I asked him to make a dressing for them, and went about the rest of my business, finishing up the prep for the rest of dinner before realizing what he’d done.