Juno is the terms of partnership — commitment, loyalty, and what you actually require of a person you bind yourself to. As Jupiter's wife she also carries the shadow of that bargain: jealousy, betrayal, and the power imbalance inside a union that looks settled from outside.
Transiting Juno circles the chart in about 4.4 years. Her contacts put the contract under the light — what was agreed, what is being honoured, and whether the arrangement is still one both sides would sign.
commitment, the terms of a bond, loyalty and betrayal, and the balance of power between partners.
Transiting Juno square natal Venus tends to surface the difference between what you enjoy in a relationship and what you require from it.