Just sorting through a memory box with DH and we found the birth congratulations card from my DM when our PFB was born, which reignited a (fairly trivial) argument with DH over the message DM wrote in the card.
The card said "Many congratulations, especially to Bubbins" (i.e. Me, her DD).
DH took offence at this as he thinks it sounds like she was deliberately excluding/minimising him. I think it is simply acknowledging that actually physically giving birth is a big deal and DM is just acknowledging that.
Who is being U?