The grandpa is acting like a child. A mature adult if they hear from others that their family member screwed up, they would say soft words to 3rd party and send them away promising to solve it in next session. Meanwhile, hear the other part of the story from the family member.
I've seen parents behaving that way and whenever somebody accused my sibling of something, it also naturally came from me. You give both sides a chance this way.
The grandpa is acting like a child. A mature adult if they hear from others that their family member screwed up, they would say soft words to 3rd party and send them away promising to solve it in next session. Meanwhile, hear the other part of the story from the family member.
I've seen parents behaving that way and whenever somebody accused my sibling of something, it also naturally came from me. You give both sides a chance this way.