How to tell if your Aquarius partner has a lover?

Mental infidelity

No need to pursue natives of the sign of Aquarius to know if they have a lover, they will tell their partners by themselves.
Despite their apparent liberalism, Aquarius is rigid in matters of morality, so they have old-fashioned ideas about loving behaviour outside of marriage.
Moreover, this sign is not conventional enough to be content with a secret intrigue and will consider more honest to confess openly their feelings to their partner for discussion and look for a joint solution.

Does your partner have a lover?