I guess it would depend for me on why he is your Ex and how long it has been since you divorced. And how much of making the quilt your daughter could do herself. My ex did horrendous things to my youngest to punish me for divorcing him. My sons have never forgiven him for that and so they and the youngest don't see him at all. But my older daughter still sees him and it bugs me, but for her sake I keep my mouth shut. She knows how I feel but I don't make it an issue. I would show her how to make something for him, but she is on her own for doing the work. A quilt is hours and hours of work and I would be afraid he would never use it just because I made it. My daughter appreciates that I let her spend time with him without guilt and she sees what he has done and my keeping silent has shown me to be the better person.