Parameter stretched, causing the filmy parasol to undulate slowly.
Its surface undulated slowly as it melded itself to the scanner.
She undulated slowly, clutching a pillow in both hands.
She undulated slowly against me, her muscles forcing the egg from her body into mine.
Tiny scales covered every inch of him, including his stubby tail, which undulated slowly.
Her pelvis cradled him tightly and she undulated against him slowly as he drew on all her senses.
She undulated slowly against him from his thighs up to his chest.
As I watched, it undulated slowly across the cracked paving.
It undulated slowly, like a living beast, just waiting for her to succumb.
It undulates slowly and I am pan of its rolling rhythm.