SO problem with photos

So my so doesn't like taking pictures but agreed to take maternity ones with me. The day comes (yesterday) and he just gets so annoyed that he wasn't prepared and that he doesn't want to be there wants to leave after like 3 pictures and just has everything to complain about. He doesn't even look happy in the pictures. I dont get it. He agreed and said he was actually excited for it. It's not like they were professional just photos taken with a phone. Did anyone else's SO do the same? Thai just makes me so upset it's our rainbow baby and I just wanted some nice photos since we donteven have a lot of ourselves.