Q. By seeing whom can a mumin pray tamam namaz?

A. A mumin can pray namaz by seeing anyone of his blood-relatives such as mother/father, son/daughter, brother/sister, uncle/aunt, niece/nephew or grandmother/grandfather/grandchildren.

Q. Can a wife pray tamam namaz by seeing her husband and vice-versa?

A. Yes

Q. Can a mumin pray tamam namaz by seeing his in-laws such as mother-in-law/father-in law or daughter-in-law/son-in-law?

A. No, he cannot

Q. Can a mumin pray tamam namaz by seeing his relatives by rada'at?

A. No, he cannot