Getting kind of OT, but:
DH is a great dad--this is one of the few times I've been bothered by an attitude/issue of his regarding the kids. She has no idea he feels this way, and yes, I think he is working it through with me, but I would kind of like to stop hearing about it, TBH, because it does make me feel like he has unfair expectations. So what if she can't sing in tune, YK? And yes, she has other wonderful talents, including a huge gift for art, which is also a gift of his. She also has a marvelous gift for animal and plant identification like DH and is a major nature-lover, just like DH. They actually have a lot in common. So I don't know why this is such a big deal.
I guess it's just that this is such a major interest of his. At heart he is a frustrated musician, I think, and he also has recently developed some kind of throat/vocal cord condition that causes HIM to be unable to sing for any period of time. So...there's a lot there, huh.