Is my Filipina girlfriend cheating or have a secret boyfriend ?

Hi all,

I’m a foreigner who is currently staying with my girlfriend in batangas. Her family seems nice but she has a brother who sometimes comes around the house and appears to live in the house but is currently not staying there because of work.

2 weeks ago I found my girlfriend showing her woman part in the CR to what looked like her brother. I got quite shocked at the time and started asking her what she was doing and she told me her brother is medical trained and she was showing her part to him for medical purpose. She has been complaining to me in the past about pain in her cervix area so I figured maybe that was it. The reason I opened the CR door was because she was talking on the video call and I thought she was talking to me so opened the door and put my head around to tell her I couldn’t hear here.

Yesterday, we were eating at jollibee and I went to pick up a piece of chicken and she thought I was going for her phone and she snatched her phone off the table. I asked her why she reacted so strongly and she said she had trauma from her ex going through her phone without her consent and she was sorry,

Do you think I am being played a fool here ?

Thanks