To not want to fight the Wedding battle

[maartjebaabes]

My DD is getting married next year. DW died 4 years ago. DFSIL (dear future son in law!) has two divorced parents both remarried.
DD has invited my DP of 3 years, but whilst I will be at the top table, DP will be on one of the standard guest tables with grandparents, cousins, aunts etc. DD wants an empty chair where her DM would have been.
I think this is absolutely fine – if new partners were at the top table then there would be 6 spaces there, and in other circs 8. DP thinks this is a slight and they should be at top table.
AIBU to direct DP here? www.getyourgriphere.com

That is quite honestly one of the most insensitive things I've ever read.
Her Mum has been dead for four years, which is NOTHING, this is her wedding day - hard enough without a parent - and your girlfriend is kicking off that she's not on the top table?!

I would be telling her more than to get a grip if I were you, OP.