Step 5: Combine
Gently fold the egg whites into the yolk/cream mixture with a spatula.
Scrape the egg whites out of the bowl with your rubber spatula, and use a gentle sweeping motion to incorporate the whites to save all the air you just beat into them. (If you whisk them in all of that nice fluffiness will be lost.) You should still have some small blobs of unincorporated eggwhite (see last picture), and if the mixture is allowed to sit it will separate.