Jupiter in the 7th house, if well-placed, nearly assures that the person shall have an understanding spouse. The person will be married to someone who will be supportive and kind to them; additionally, the spouse will be someone who will be wise and ethical in their conduct and behavior.
Such people who have Jupiter in their 7th house tend to see good growth in their finances and overall life after marriage; they will also likely marry someone who comes from a financially well-off family. It is possible that the wife or husband of the native may also be spiritual and/or religious.
Additionally, Jupiter in the 7th house makes a person dependable in partnerships and business deals; they will rarely, if ever, fail to deliver on their promises and are usually ethical in their nature even with money. Such people are also likely to know other influential individuals in their connections.
Natives with a Jupiter in their 7th house will also tend to value relations in terms of fairness and ethicality; often, they will be the responsible person in their relationships or marriage, even as far as sacrificing their own happiness for the sake of their spouse. However, they tend to have high standards regarding conduct and will avoid interacting with anyone who does not adhere to their strict level of Dharma or righteousness.
They are also quick to dissociate themselves from and with any person who comes across as an unethical and unreliable person. In some cases, they may enter into business partnerships with their spouses which too may bring them fruitful results.
Coming to aspects, Jupiter from the 7th house casts His 7th aspect or Drishti on the 1st house, which is beneficial for the person or native as their physical health overall remains decent though they may have a chance to gain weight if they do not take care of their health or exercise regularly with a proper diet.
If afflicted, Jupiter’s abilities will be slightly affected and the person may still have a good spouse but there will be more periodic disagreements and fights between them. Similarly, business partnerships are also likely to suffer.