What does it mean to retrograde in the seventh house of Pisces, the goddess of marriage, the sun cancer?

The sun is the constellation in which the sun runs when you were born!

Sun Cancer means that when you are born, the sun moves to Cancer.

Similarly, when the marriage god ran to Pisces and then landed in the seventh house of your chart, the marriage god Pisces was born.

The influence of the god of marriage is negligible and can be ignored.

Judging from your configuration, your husband will be a gentle, considerate, imaginative and emotional person, and at the same time a very complicated and soft person. Your marriage should be relatively happy ~ ~ We both attach great importance to each other ~