The average age for girls to enter puberty was 12 to 13, and around 14 for boys.
In royal marriages, particularly between brothers and sisters, the parties seemed to be often much younger.
It was not unusual for a northern Egyptian to marry a Nubian, or someone even from another country.
Marriage contracts do not generally tell the age of the parties, but we know from other documents that marriage almost always occurred after sexual adulthood.
Certainly Egyptians seem to have taken mates in what most often appears to be lifelong monogamous relationships.
After the Third Intermediate period we begin to find ancient "marriage contracts" that incorporate the phrase shep en shemet (price for "marrying" a woman) and mostly set out property rights without elaborating on the act of marriage itself.