Did my gf cheated on me with her ex ?

I´m dating a girl from another country. We have 6 months together now . Recently , I came to visit her and checked her phone . I found out that she and her ex met up at 12 midnight the same day that me and her didnt speak, we got into a fight two days ago. The reason why they met up , her ex owes her money. She was coming from her town to visit her mom . The trip was about 5 hours . During that trip , the ex texted ¨ Where are you coming from ", tell the bus driver to drop you off by Masgas gas staion" She replied Where San Carlos. After that they met up for the exchange of money .

When I asked her how much money did he give you. She says , I don´t remember . I can see in a previous message that she asked him about the money . She didn´t lie about that but she still saw her ex . The texts were short and cold .
. She says her mom was waiting for her in Quevedo but the ex asked her to stay at San Carlos , where he works . He works nigh shifts . When I found out ,I just simply left the house and didnt say a word. She called me a thousand times crying , telling me that is not true . Even her mom called me and explained to me everything with so many details .She said that her daugther was sick that day and she needed money . She only got the money and left to the hospital. I do recall speaking to her on Saturday and she was indiferent because we didnt speak that week. She said, i didnt care aout her , that I wasn´t there when she really needed me . she was sick all day in the hospital .
Did she cheat ? she swears she didn´t