I don't know exactly how long you are now staying in our country but my friend who owned a travel agency in the Manila told me that a tourist from UK and USA can stay in our country up to 1 year. All you need to do is to extend your visa for every 3 months. http://www.immigration.gov.ph/cms/
I still believe that there are still conservative families in the Philippines but I am not well convinced if she is. But then try to understand and talk to her Mom. Explain your side, a mother always understand. Have a try