Kneading the meat?
I'm sure you'd have to catch Sakuya after hours for something like that, a bit of a groping massage where you'd explore her body in a locked room, squishing her soft middle, groping her petite breasts, and feeling up her thighs while the maid lets out little moans of pleasure.
Her, now ill fitting, uniform would slowly begin to fall away under your ministrations, her chest bare and buttons undone as you slowly free her from the constricting clothes, revealing some rather lewd undergarments that hint at how she may have been planing for something like this, the black lace and matching garter belt obviously designed for private shenaniganry that would involve her relaxing on the bed so that you could drink in the sight.
Reality would be a tad more...frantic as you pulled the cloth from her hips and rear, the back part looking more like a thong than an actual garment, to find that her womanhood would be slick with need, the girl positively panting for you to go in.
Not wanting to dirty the furniture, I imagine that Sakuya would press her chest against a wall and present her rear to you, her back arched a little bit so that it would look a tad larger and her hips swaying as if beckoning you in.
I'm sure there'd be no arguing on that front and soon enough you'd be pressing up against her back, hips crashing into her well padded rear and your hands pinning hers to the wall as a chorus of loud moans slipped from her lips.
She'd gasp and pant as you pounded away, the flesh of her rear bouncing slightly with each crash of the hips and a lewd, wet smacking sound signalling each meeting.
You'd be filling the deepest parts of Sakuya and, as she tried to look back at you, you'd be able to see that her gray eyes would be blazing with heat, lust and a dozen other emotions battling to be seen as she met your gaze.
You'd feel her tunnel give a little quiver halfway through, a precursor of what was to come, and a squeal of bestial longing would signal that she'd achieved bliss.
Not that you would be too far behind her as the silken walls of Sakuya would be inexorably caressing you to release, gripping you tightly with ever bolt of pleasure up until the last, and largest, came, your member depositing its payload deep into her despite a brief, almost forgotten, call for you to pull out lest she get pregnant.
Immediately after this action you'd probably end up on the floor with a pleasure drunk maid still in your lap, her extra large behind filling your lap and her thighs almost pushing her legs apart due to how large they'd gotten.
You'd stroke her hair and fawn over her but, after she'd had her fill, you'd soon find the woman standing before you, clean as a whistle and her clothes returned to their normal state.
She'd be quite stern looking, and give you a small flick on the forehead for not pulling out, but as she left to take care of some errands, you'd almost swear that there was a little bit of hope when she talked about getting pregnant, a ghost of a smile dancing on her pale lips.
Good night, gotta sleep.