Bertha smiled with satisfaction and teased Derek.

Derek was teased by her. He became a little restless. His breathing began to quicken and his humming increased.

Bertha saw that he had endured so hard, she asked softly. “Do you want it?”

His teeth clenching his shirt trembled slightly, he frowned slightly and then suddenly let out a cry. “Um…”

Bertha was extremely patient, she smiled complacently. “Okay, it's inconvenient here. After we return to the ...