Do you think he cheated? Or that she is lying?

My friend and I done this thing to see if my SO cheated on me with his ex when he was at drill, suppose to be with a friend the day after. I found a receipt in his room which he knew about and said she probably threw it in his bag when he brought his laptop. The stories wasn’t adding up. So I had my friend text his ex, acting like an old friend from high school. & this was towards the conversation that got interesting. I just want to know what you all think. Do you think shes being truthful or lying bc she thinks it’s a set up?? I really need advice. He said nothing happened and they wasn’t ever in a hotel room together she just brought his laptop. Ladies please help. 😭 I trust him but I just had this gut feeling. I need actual advice not something short like “leave” tell me an experience or something, or what you would do exactly. When I showed him, he didnt really try to deny it. He left and changed everything. But came back and is giving me reasons why he wouldn’t do something. Please. Please talk to me about this.

She texted saying “I can’t believe you had sex with him😂😂 he has a gf and everything”

I am insecure. The only way she could be saying I’m “controlling” is if its because I don’t want him talking to her but he also agreed.

They don’t have any kids together, no bills or anything together. Please tell me what you think.

Do you think she messaged the friend on Facebook and asked if it was him texting her and she said no and said what she did bc she knew it was me??

I will keep updates to reply to who says something. I’m going to stay anonymous. Please help.