How to tell if your Sagittarius partner has a lover?

Clandestine adventures

The natives of Sagittarius sign love the danger, so they are prone to clandestine adventures and love triangles.
Although, on the other hand they are so affected by what people say they do not want to stray too far from the established customs.
If, despite everything, they decide to do it, they are usually very easy to discover because they are terrible liars.
They love flirtation, but their adventures usually do not last long or matter enough to seriously interfere with the married life.

Does your partner have a lover?