If a person forgets to perform the prostrations of forgetfulness after prayer, their prayer is still valid. However, it is recommended to perform the prostrations if one remembers to do so. The prostrations of forgetfulness are a means of compensating for any mistakes made during the prayer. Therefore, if she remembers after the prayer, she should perform the prostrations of forgetfulness, and her prayer will be complete. It is important to note that forgetting to perform these prostrations does not invalidate the prayer.