My treacherous BFF

She floated into my car on a fluffy pink cloud of bliss.
“My best friend gave me this necklace today,” she oozed, fondly stroking the precious declaration of eternal friendship. I choked on my water.
“And your best friend is…?”
“Tammy!” she purred.
Yup. The same little bitch who announced JUST THE PREVIOUS DAY that she’ll never play with my daughter again...ever.
While she clearly moved on from last night’s crisis, my wounds were still raw. But I bit down my catty retort. My BFF issues are forty years more complicated than hers. What kind of mother and human being have I become, anyway, who rolls her eyes at the idea of unselfish loyalty to a soul sister?