“Hello My gf told me her sister was reading our chats with the help for her cyber friends but my gf doesn't question her sister. What should I possibly think of this ??”

Another soul answered...

How old is the sister from your gf? I mean i get that she might be protective of her, checking whether you're a decent guy or not. Checking & reading your messages might make her satisfied whether or not you're taking advantage of her from her POV. But this does breach privacy and is incorrect. It will make you uncomfortable ofcourse. You won't be able to type anything freely. Her sister will always be on the back of your mind. You should talk to your girlfriend and tell her you're not comfortable. Ask your gf to talk to her sister and make it stop. Give alternatives. Maybe her sister can directly talk to you about stuff if she wants to. Also idts she can see your messages because wdym "Cyber friends". Maybe her sister is trying to scare your gf but she actually can't read. Because unless someone has email or password access of your GF, nobody can view chats. So maybe tell your girlfriend to change her gmail password and social media passwords. It'll log out from all other devices. Maybe your gf is also not bothered because she knows her sister is just trying to scare her and she can't really read y'all chats