The court heard she told investigators her former romantic partner had arrived at her house on Sunday and told her "I *advertiser censored***ed up three gringos".
The court heard she said, "what do you mean?" to which he replied, "I killed them".
Prosecutors alleged he then gave her a mobile phone and said "look what I got you", before taking her outside to show her the new tyres on her car that had been allegedly stolen from the trio's vehicle.
Charges against Jesús have not yet been upgraded to murder, but that is expected to happen in coming days.
Alleged details of attack on Australians Jake and Callum Robinson heard in Mexican court