10040N Long Fitted Formal Prom Dress in Black

Macy's

Deep red/maroon color matches closely, V-neckline matches, Thin spaghetti straps match 'thin-strap' description, Long, fitted silhouette matches source appearance, Satin material matches lustrous texture, Formal/prom dress style aligns with perceived event

Windsor Abigail V-Neck Strappy Satin Midi Dress

Windsor

Deep red/maroon color, Satin material, Deep V-neckline, Fitted bodice, Midi length

JLUXLABEL Women's Surreal Satin Maxi Dress

jluxlabel.com

Deep red/maroon color, Thin spaghetti straps, Fitted silhouette, Maxi length (possible match)