His older daughter is past the liberal (Ginsberg’s) age of consent, twelve years.
Malia was born on July 4, 1998 and Sasha was born on June 10, 2001.
So they are both well past the age of Aisha, Muhammad's second wife, who he married at age 7.
But, being a devout muslim gentleman, Muhammad waited until Aisha was 9 to "consumate the marriage".