Your Golden Child should have been born age 5, and remain that age forever. You might want to check her age on her details screen.
If any of your males has ANY skill at breeding, they will frequently make use of that skill and can put an entire population of females in Village Center. Just because you don't have that set as their preferred skill, doesn't mean they won't do it!
Your concern about them nursing for 7 years is likely unfounded - the Golden Child has no effect on the number of births or the duration of the nursing period. The attainment of Level 3 in Fertility is likely the culprit there.
Your Golden Child will get "interesting" in her own sweet time. Have patience.
[And no fair editing your post without a trace while someone is replying to it!

You originally said that Mali was 7!

]