5th house lord in 7th house
1) Before knowing effect of 5th house lord in 7th house we have to know about Fifth House and Seventh house. As 5th house lord is placed in 3rd from own house so you may read First house lord in 3rd house.
2)In general views 5th lord in 7th house is not consider so much good. In kalpurush horoscope 5th lord is Sun and it is debilitating in 7th house so 5th lord in 7th is not so good. One another view is 5th house is most auspicious house regarding Dharma and 7th house is most important kaam kona so it is not consider good as a dharmadhikari (5th house lord) sits in a kaam house.
3)7th house belong to marriage and when 5th house lord (5th house also belong to love and emotion) placed in 7th house native don’t following traditional regarding marriage. Native may not doing his duty sincerely regarding marriage relationship. Native may be easily falls in love without thinking so much regarding traditional boundaries. Native may have affairs before marriage. This combination may be one cause of love marriage. Native may be suffering in his marriage life. Native may faces trouble in his relationship. Actually in kalpurush horoscope Libra is 7th lord which is a movable sign so 11th lord from 7th is badhkasesh so 5th lord (which is 11th from 7th house) may be badhkasesh for 7th house. Means 5th lord in 7th house creates problems for 7th house natural significant matters. But if 5th lord in 7tj house is well placed then evil effect may reduced.
4)5th house belong to children and 7th house is marak for lagan and 3rd(dussthan) from 5th so in general it is not consider good regarding children. Native and his children lives away from each other means native is living in different place and children is living different place.
If 5th house lord is well placed then native have very good children which brings name and fame for native. Or native become famous through his child. Native children may lives in forigen country where he gets good name and fame.
If 5th house lord is not well placed in 7th house then Native child may suffering from health problems. If heavily affiliates then there may be loss of children or no children depending on horoscope. There may be dispute from children and native. Native children may go away for forigen country from him.
5)7th house is bhavat bhavam for 4th house means belong to study and 5th house is for knowledge so 5th lord in 7th house indicating native may go away from his birthplace to gaining knowledge. If any yog for forigen Travel then native go for forigen place for obtaining Vidhya because 7th house also belong to forigen place.
6)5th house lord in 7th house if well placed then native is scholar, good name and fame, wealthy and rich. Because it is establish relationships between Kendra(lord Vishnu) and Trikona (goddess Laxmi). Native may also become famous in forigen land or may gets success away from his home land.(One unique example may be lord Rama horoscope in which 5th lord Mars is excellent in 7th house . Yes there is so many other good yog is present in Lord Rama horoscope but as still my mind is just plugging Lord Rama so I mentioned.)
7)5th house belong to abdomen so 5th house lord in 7th house may cause abdominal problems(if 5th lord is affiliated in 7th house then more chances to abdominal problems).
8) 5th house belong to politics and diplomats so 5th lord in 7th house native may gets active in politics and may become diplomats in forigen country. All depending on strength of horoscope.
9) When 5th lord with 7th lord in 7th house then Native child may lives in forigen country. Native may gets profits from forigen place. Native may have friendship with scholar and religious person. Native gets success in politics. If this combination is not well placed then it may cause trouble for children regarding there health and life.
10)If you want to know about effect of different planet in 7th house you may read Planet in 7th house.