While I remember, pertaining to Aisha, it isn't really that long that we've been so discriminate in Britain about the age of consent. At the start of the Victorian era it was still 10, as maintained in the 1861 Act. The earliest age for marriage was 12, as it had been since the "First Statue of Westminster" in 1285 and continually reaffirmed up to and including in1576, however this later date accepted age 10 as discretionary for carnal knowledge and distinct from rape.
From a modern-day perspective its sick, but those were different times and people certainly didn't live so long, so as a proportion of their life it was comparable. No less inappropriate, though.
How does that compare to laws in the Puritanical USA?