F. Jasmine's Biological Clock

“ The silence was over, and it was like those kitchen times when, after the first uncanny moments, she realized the reason for her uneasiness and knew the ticking of the clock had stopped- but now there was no clock to shake and hold for a minute to her ear before she wound it, feeling relieved.” pg. 165

This happens just after F. Jasmine hits her date, the drunk soldier, over the head with a glass bottle when he tries to kiss her. The silence ends just as the soldier ends and she realizes that the silence is just like the silence of the kitchen when the clock stopped ticking, but now she had no clock to try to fix. The images of past sexual events flash before her eyes and she thinks the world is crazy. By finally connecting her past encounters F. Jasmine seems to see the idea as reality instead of childish fantasies. She is unable to fully understand the maturity of the acts and seems to use the word “crazy” as a synonym for sexual. Therefore earlier in the novel when she says “ It happened that green and crazy summer when Frankie was twelve years old.” the phrase“crazy summer” can be replaced with “sexual summer” and the “it” she is referring to is not only the wedding, but her maturity.
The clock also represents F. Jasmine's sexual maturity over the passage of time. She, before, was unconscious of her biological clock but now that she is entering her more sexually mature years she is uneasy and the clock stopping shows that she is trying to ignore this change. It is strange that she jumps at the chance to be sexual and grow up quickly, but since she cannot comprehend her own sexuality she cannot use it. She should not be having sex at twelve, but she should be aware of her own biological changes that are changing her view of the world throughout the novel.

Will F. Jasmine realize her biological maturity? Will she have sexual relations before she even realizes this biological change? Why is she trying to block out her own maturity that she ironically runs towards at first?