Hoping to gain a bit of perspective from others.
DH & I have a DC each & a DC together. I have an amicable relationship with my exdp & have 50/50 shared care of our DD. My DH has an awfu relationship with his ex & at best sees his DD EOW (cancelled by mum frequently due to illness/brownies etc).
He has admitted that he resents me 'as I see my DD more than he sees his' & I believe he feels guilty that in turn he sees my DD more than his own. I have tried to explain that all circumstances are different, but it's almost like he punishes me because of it.
My mum & dad mentioned that they would like a canvas picture of us (me, DH & my 2 DC's- their grandchildren) my DH went mental, he said 'I've got a daughter too & your DD is not even my daughter why should I be in a picture with her & not my own DD 
He was so angry & awful that we've not spoken all weekend 
My parents always give his DD money/presents for Christmas & birthday & on their & my part there was no deliberate act to leave his DD out.
They just wanted a picture of their grandchildren with their mum & dad.
Is this unreasonable?