My little sister needs our help

I'M NOT GONNA SUGAR COAT IT! My little sister and her three children have been ABANDONED by her for lack of better words husband. My sister Katherine is the strongest person I know. She would never ask herself but as her big brother I feel it my duty and honor to ask on her behalf. Her husband has left her, three children and his entire family to run off to Brazil to live with a chic he met on facebook!!! Katherine has overcome many obstacles in her life, helping raise and pay for her husbands other children along with her own. She has also battled obesity which she has conquered by loosing nearly 200 lbs with hard work and dedication. However this is one obstacle she's going to need some help with. She has been left with nothing but a broken heart and three beautiful children to provide for. I know Katherine is strong enough to get through this on her own but with some help we can all make this just a little bit easier on her.