This is not SHUNGA actually.
The title is 婦人相学拾躰 (Fujin Sōgaku Jittai; Ten Types in the Physiognomic Study of Women).
She is one girl of 10 girls on this SHUNGA.
She is washing her hair now.
We can get to know their daily life on Edo period.
Fujin sogaku jittai