I’m going to echo what others have said. I think you did the right thing. You paid attention, talked to your XW and made her aware you are concerned about your daughter’s view that there is yelling going on. My daughter has Dyslexia as well so that struck a chord with me. Keep the lines of communication open. If your kids start indicating they are fearful of XW’s bf, that would be a time to do something. Have you met the bf? If not, you may want to do that soon. I wouldn’t approach it with anger...that will only make him defensive. I would probably just ask him if he is aware that your daughters are worried about him yelling at them. Some people are just loud. I know my kids have accused me of yelling before when I definitely wasn’t. What they were reacting to was the feeling of disappointing me. Anyway...this coparenting thing is difficult to say the least. At the end of the day, it is your XW’s responsibility to protect your girls and to set the boundaries with her bf. You’ve done what you need to do...for now.