Bauck and Wegmann trading portraits

Portrait of Jeanna Bauck by Bertha Wegmann, 1881

Bertha Wegmann painted a portrait of her friend Jeanna Bauck...

Jeanna Bauck, The Danish Artist Bertha Wegmann Painting A Portrait

...and Bauck returned the favor, painting Wegmann in the studio that they shared.

Portrait of Jeanna Bauck by Bertha Wegmann, 1887

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Wikipedia: Jeanna Bauck and Bertha Wegmann

Previous posts about artists doing mutual portraits: 
Yaroshenko and Kramskoy paint each other in watercolor
Two sculptors create each other's portrait
Drawn Together
Mutual portrait with C.F. Payne
Trading caricatures with Steve Brodner