One set of spells you were taught by your grandmother was one of subconscious spells that you could cast even when asleep, including one that would accelerate your rest state and let you wake up refreshed in a fraction of the time a normal person would. You used it to do all-nighters during school, though you can definitely find new uses for it as a plane-sorcerer, as you wake up a few moments after the stroke of midnight. Opal, thankfully, was still asleep, and hadn't tossed or turned on her somehow-larger-than-her bed, keeping you snug in her boobs. Her snoring came out as a light trumpeting sound from her trunk—quieter than you expected, though her mouth was also wide open. She had elected to remove her shirt before goign to bed, leaving her in just her lacy bra and panties beneath a light blanket—easy for you to move around on. You did a few tests, squishing her boob flesh beneath you, and were satisfied when she gave only a few murrs in response. She should stay nice and asleep while you're exploring her...

...Now, where on her will you go first?