SSS maternity benefits

Hello mommy. Question lng about filing maternity benefit. Employed ako and member ng sss for 2 and half yrs. Me and my partner decided to keep my pregnancy private lalo sa office namin na madaming chismosa don't worry wala kaming ilegal na ginagawa haha sadyang gusto lng namin ng privacy. So para di malaman about sa pregnancy ko di kame magcclaim ng maternity benefit sa sss dahil sympre malalaman ng employer at ng officemates once magfile kame. So my question mommies is, pwede kaya ko magfile direct sa sss kht after manganak without the knowledge of my employer? Sympre nakakahinayang din ung benefits kht di namin advance makuha kht reimbursement? Basta di malaman ni employer. Thanks in advance mga mommies!!! 😊