From me as a dominant…
To have her in a larger room, not something romantic. Bright lights on.
Let her undress to what is needed. So depending on her clothes, to her bra and panties, or from the waist down.
Give firm orders.
Let her stand in front of you and let her say out loud why she deserves to be spanked. What did she do wrong? Let her make her excuses for that.
Lower her panties yourself. Check her vulva. Let her spread her legs so her labia can be spread to see if she is aroused.
Let her get over your knee or bent over the chair.
Spread her ass cheeks, or let her spread those herself, to see if she is fully clean.
Start the spanking.
Let her count out loud the strokes.
Tell her how her skin changes color.
Check her labia for wetness during the spanking and tell her about your findings.
After the spanking let her stand in the corner with her panties down. Red ass cheeks stay fully visible.
Or when her panties were wet before the spanking, let her put her panties over het head, her crotch in front of her nose so she can smell herself.
Let her get out of the corner to let her tell what she has learned so far and let her make her excuses again.