Aphrodite was a pushy lover; no one - least of all Peitho - would be surprised to hear that. Besides, thousands of years of sex, they both knew what they liked and had little interest in bad sex.
So Peitho did as she was told, not because Aphrodite commanded it but because, oh sweet olympus, she wanted all of Aphrodite for her own. She wanted to have everything that was her.