The hand that's still holding onto him grips hard. Something is happening, she can feel it building rapidly, with every motion they make.

"Arthur, I-" She cuts off, as the sensation boils over inside her, taking her by surprise. She cried out, pleasure spiking through her, making her body spasm and clench around him. Her atm gives out and her shoulders fall to the mattress, bending her back in an almost perfect arc.