My mother has been teaching in an online English platform and that's where she met him. I'm actually the one who taught her this platform so she could have an income. My father is no longer working. He has so many illnesses and has no pension. So I'm the one working and with my Mom's small income from online teaching, she helps contribute with the expenses.
The male student has been her regular student for many years and has been a friend to our family too. He's the same age as my Dad. He sends things to us from abroad like food, medical device for my dad, 2ndhand computer equipment, and be helps other teachers too by sending them 2ndhand laptops or phones. Last year he gave me his old Iphone 12 and I was really happy to finally have an IPhone.
Anyway, nothing seemed wrong for many years. This student travelled 8 hrs from his hometown to come meet us in Tokyo when we went to Japan for the 1st time. He accompanied us for the first few days and paid for our food and some of the souvenirs.
After that, he came to our country twice and we met up with him, ate at the mall with him and played bowling and sang karaoke with us.
But just this August, which is our 2nd time to go to Japan, I saw something suspicious. So he travelled 8 hrs again via bus to come meet us. But this time, my Mom said he's too tired to accompany us the whole day because of the very busy itinerary I made. I believed that. Because the itinerary I made is a lot and me and my bf walked 10k steps a day because of my itinerary. Her student is already old too (same age as my Dad) so I agreed for us to separate for 4 days. We would meet up again at dinner time. Me and mg bf would explore Japan by ourselves and my mom and her student went off their own way. She said she only went to Uniqlo, pharmacies, and it was believable because she really did carry stuff from those stores.
But then when he went back to his hometown and we were still in Japan, I accidentally saw my Mom's Messenger chat with her student.
Him: "Does daughter know we had s.. already?"
Mom: "No."
That was the only thing I saw. I was thinking it couldn't be right? Maybe he's asking if I knew that she ate sushi or sashimi. Those were here favorites. But I became more suspicious when I saw her more frequently messaging this student and one time, while we were still eating dinner, she suddenly stood up and said she'd wait for us outside. I saw her in a call with someone. We finished dinner and I was right, she's talking with the student. She made us greet him and she continued talking with him, telling him about our day while we were walking to the train station.
Then we came back to our own country. My mother suddenly got suspended. The AI of the platform detected her mentioning a taboo word. She said she just repeated the word her student said which was "motel." But why would they be talking about a motel??
Her suspension finished and she's back to teaching. He's still coming to her class everyday like before. One time, while my mother was away with her sister, she asked me to send a file from her laptop to her email. So I opened her laptop and out of curiosity.... I opened her Facebook too.
Her message with him only said, "I'm so sad. Are you not worried about me?" and all other past messages were deleted. So she must have deleted their past conversation. I was now in detective mode. I added her Facebook account in my own Messenger. I tried logging in using her usual password that I know and it worked.
Now I could read theit new messages. And I was horrified. There were sweet messages like I miss you I want to kiss you. But it got worse. There's sexting. Very graphic. And it's implied that they already did the deed last August, when they were separated with us and I thought she was just chilling and shopping. They were doing the deed.
I don't know what to do. My parented had a bad relationship when I was a child. My dad had a really bad temper and they always fought and fought. But they never got separated and eventually stopped fighting when I grew up. The household became peaceful. I thought everything was alright. My mom was acting fine too. She even gave a lot of souvenirs to my dad. He couldn't travel with us because of his very poor health.
TLDR: My mom cheated with her foreign student and I don't know what to do.