Advise Her: "My Eldest sister is sleeping with our Aunt's Husband"

My eldest sister is sleeping with our aunt's husband. I visited her on my way going to deliver good for our company customer and met our uncle leaving her house in the afternoon, that was how I found out and it took her a while before she opened up. She lost her husband to accident last 9 years and she is left with 3 kids twins girl and a boy to carter for .

I tried to help her out despite the fact that I earn 55k every month. She told me that nobody wants to help her and truly this my aunty is a big business woman, our late mothers only sibling, but she never gave us a dine. This my sister gave up schooling and saw me and my younger sister through school, I was thinking she will marry and the suffering will stop, 6 years in marriage, her husband died. This my aunt asked my sister to come and work as a nanny for her, so she can be paying her 40k, my sister told her that she can't leave her children unattended to , and the pay is low. She told me this our aunts husband started giving her money before they started seeing each other. That he started helping her 4 years ago.

I feel sad that some men these days can't offer a widow a clean help without anything in return. I warned her that I am not a party to such evil that she should stop so I can raise money for her to start her vegetable market in a larger way. This my aunts husband don't even give her larger amount but 15k, 20k and the highest was 30k so she said. That he keep postponing to help her start a business and her children are still in public schools. She told me she has no source of help, that if she stop the relationship who will help her and her kids? Me on my part, I am praying for my aunty not to find out because she will rub her name in the mud. She is not on Facebook, please I need advise on how to convince her that the relationship is not really good for her. She is 44 years.

Thank you!.