Infidelity hunch

Good morning everyone! I'm asking on behalf of a friend. She has a hunch that her husband is cheating on her, so she's hoping that securing the CCTV footage at SM MOA and NAIA would prove her husband's infidelity. They're both working abroad, but in different countries. I'm trying to help her out and this was the help she wanted me to give. She also has a lawyer friend here in the Philippines who can also help her out. She gave her the power of attorney. Any advice po?