I attended a friends wedding on Saturday approx 6 months after I lost my my mum. I am one of 4 friends of the bride who all know each other. Two of these 4 were bridesmaids so were sat on top table. Each of these friends had their mum with them who sat on my table. The other friends mum was also invited but she didn't attend.
Although I was fine on the day afterwards I did think this a little odd.