How to tell if your Taurus partner has a lover?

Taurus are vulnerable to temptation

Like all earth signs, Taurus love stability and harmony, so have a reputation for faithful; however, they are also known -especially men- for their love of carnal pleasures, so -in more than one occasion- they throw a glance toward a short skirt.
If they fall into temptation and sin they are not difficult to reveal because their mastery of the art of disguise is null.
It is likely that one of the first signs of infidelity is the dedication they put into their grooming, which is usually neglected enough.

Does your partner have a lover?