The 'Material Girl' singer kept her face hidden in the picture and captioned it as "The perfect end to a perfect day #livingforlove", the Mirror reported.
In the picture, the 55-year-old pop queen can be seen leaning on the edge of the tub with her hair tied up out of the way, as she peered over the edge.
Madonna enjoyed a relaxing Mother''s Day with her children Mercy, 7, and David, 8.