Honoring parents includes feeding them, clothing and covering them as well as accompanying them.
One may not sit nor stand in ones parents designated place in shul or at home or anywhere else where they may have a designated place.
A person must honor his grandparents, as well as his father's wife and his mother's husband, his father-in-law and his mother-in-law.
A person must honor his older brother; even if he's a half-brother.
Source: Kitzur Shulchan Aruch 142:1, 143:3, 19,20
- Danny,
Tuesday, 19 Tevet 5773