My Son Impregnated His Two Younger Sisters During Lockdown - Woman Cries Out !!

In a rather sad story, a well-to-do single parent narrates her most down moment in her life. It seemed the impact of the Covid-19 has hit certain people real hard than you can imagine ! A career woman in her early 50s narrates her worst plight in the story below:

"I am a 54 year old woman, widowed and mother of three children- a boy of 17 years and two girls of 15 years and 13 years. I am an international civil servant and a practicing christian.

I am writing this to all parents to make time for their children and also seek advice because i am in a state of complete mess. In fact, i live with my three children, i am usually at the office all day long and except weekends when i am at home. And since the authorities stopped the classes for the kids, i have forbidden my children not to go out; they are confined since the beginning, there is only the cleaning girl who comes to work and leave. 

As for the children, I keep a close eye on them but today i am overwhelmed by what is happening. Every month, i check that my daughters are well, because the older one has always complained of stomach aches.  But odd enough in April, she didn't show anything, and i noticed early signs of pregnancy so i asked her to collect her urine sample for me in the morning, and i did the GIT which turned out positive. She didn't tell me much so i went back to her room to calmly discuss with her to find out who is the author of the pregnancy.

To my greatest surprise it is with tears in her eyes that she told me it is her older brother. And that since the cessation of classes this dirty act is what they do at home when i am not there, and to worsen the whole situation the youngest 13 years old also featured in their dark act. That is when i remembered that she too hasn't seen her period for such a long time. She began seeing her period at age 11. I undertook to do another pregnancy test for the youngest too and the unexpected happened: It came out positive too !!. Now in my utmost frustration anyone could ever be, i called my son to ask what really happened.

He admitted the facts  of having been sexually involved with his sisters, he has been out of the house ever since the night i  called him for questioning and i have not heard from him since".

What is the best advice you will give to this woman ?