pamper (oneself) with a spa day

Translations
баловать (себя) днем в спа
After a long week, she decided to pamper herself with a spa day.
После долгой недели она решила побаловать себя днем в спа.
Definitions
To indulge or treat oneself to a day of relaxation and luxury at a spa, typically involving services such as massages, facials, and other wellness treatments.