 

So my girlfriend and i were studying together in a cafe, it was all good until she took out her phone and started texting her mom. i got close to her but she backed away, i asked her if there was something going on and she answered no.

she kinda seemed like she was hiding something so i asked if she was hiding something, she said no. i asked again and she ofc said no proceeds to put her phone in her pocket. i wasnt satisfied with her answers and knew she was hiding something so i kept asking. i finally got her to take out her phone and tell me that she got messages from a creep, some creep was sending her nudes. i asked her if i can see the chat, she said no and kept her phone away from me. i kept asking her but she kept refusing and kept acting defensively towards it. she then deletes the whole chat and said that she didnt want me to see something that disgusting. i just got up and left. we kept arguing the whole day about it, that whole thing was very suspicious cause usually when a creep messages her she would show me but this time she didnt. what do you guys think ? what should i do ? do u think she is cheating on me?