The 7th house is opposite the 1st. The act of marriage takes us as far away as possible from who we are by ourselves: it is an agreement to live with, accept, love, and support someone who may be totally different from yourself. Marriage brings about relations with the laws and people in general. Marriage is also likely to bring travel, as at least part of the family is not under the same roof.
So Rahu in 7th house for Aries Ascendant will give you Good result if Venus is Weak or Debilitated. If Rahu is not afflicted, Married Life will not Suffer. For Aries Ascendant Rahu in Seventh House will give good financial Prosperity and Success. This placement will give you Lot of Traveling also. The native experiences some problems with their wife and feels dissatisfied with sexual pleasures. The native with Rahu in 7th House for Aries Ascendant manages a residential house with great difficulty. The native pursues the business efficiently but suffers many difficulties and problems.