Baiser is essentially a lewder battle maniac.
While Azul might just want the sexual pleasure, not just from the M play. (we've never seen her try masturbation or anything)
Baiser enjoys the sight of the heroines struggling, this is why she taunted Azul to get up even though there's plenty of chance to finish her off there.
And why she's so NOT amused at Azul giving up like that.
It's not the result that she enjoy, it's the action in the middle.
Much in the same way battle maniac enjoy having a good fight, not achieving victory (in fact, a complete victory for them can sometimes mean they're moving on from this relation)
Assuming Azul just want sexual pleasure instead of being an M, Baiser might be able to convince her to take her thing seriously for a 'reward' later