Highs and lows

kris
So after the great news we got about my husbands job offer, my sister texts me to say her husband has been cheating on her for at least a year now. They have 2 kids together and I've always really liked her husband. I just don't understand why someone would do this to someone they love. He wants to work it out but I really don't think they should especially since he would have kept doing it if she hadn't caught him. She said 'no' to working it out too. Makes me so sad for her. He's been through 3 deployments and she supported him through each. Went through her first pregnancy and gave birth alone because he was overseas. I don't get it.