It looks like her life has been spiralling out of control for years. Motherhood has not proved to be as satisfying as she’d thought and even the moneyed suburban lifestyle didn’t hit the mark. Perhaps there were growing issues between her and her husband. She’s didn’t have a good relationship with her mother either. Maybe she is damaged.
Her drinking and loud pronouncements of enjoying her life - through holidays, clothes, bags, facial tweakments and snacky type food is overcompensating a bleak reality. I don’t think she’s happy but wants to appear so, so that’s why the booze comes into play.