She smothers Clara with her breasts

"Pressure? What do you- mmph!" As Clara spoke, Reinette thrust her body forward, shifting a little to sit higher on Clara's stomach. Her dress already showed an ample cleavage, and the struggle with Clara had only loosened her dress, her breasts in danger of spilling out. As she lay on top of Clara, she **** her chest against the brunette's face, burying her in cleavage and cutting off her words as her mouth was pressed against milky white skin. Reinette released her grip on Clara's wrists, instead, bringing her arms down and wrapping them around the back of her head, dragging her more tightly into the breast smother, completely covering her face: only her forehead was still barely visible. Reinette smirked, muscles working in her slender arms as she held Clara as tight as she could. Clara was struggling, legs kicking wildly but uselessly, arms flailing as she tried to grab at Reinette. Her fingers briefly grabbed a lock of blonde hair, and Reinette shifted position, keeping one arm around her head while grabbing the offending hand with the other, once more pinning it firmly to the floor, fingers now tangled together.
"Accept your fate, Clara Oswald. You have challenged a superior woman, and now you will learn your place beneath me." Reinette gritted her teeth, grinding her chest from side to side, feeling Clara's nose rubbing against her skin as she did, her lips wet against the dominant breasts.
"Lmm mnn grrh!" Clara growled, words muffled by the smother. Her forehead flushed red as the lack of air became a more pressing issue, and her kicking legs started to slow down. Reinette didn't let up, her body tingling with pleasure as she smothered out her opponent. Then finally she felt Clara go limp under her, her fingers no longer gripping Reinette's hand, legs no longer kicking, her other arm slipping from Reinette's back and thumping against the floor. Slowly, Reinette released her hold on Clara's head and sat up, revealing her **** opponent's red face and gaping mouth. She sat astride her sleeping victim, hands on hips as she regarded her. Her left breast had slipped free of her dress in the struggle but she let it hang loose, a testament to her victory.