en_tn_lite_do_not_use/jhn/08/35.md

in the house forever

Here "house" is a metonym for "family." Alternate translation: "as a permanent member of a family" (See: rc://en/ta/man/jit/figs-metonymy)

the son remains forever

This is an ellipsis. You may translate it by including the implied words. Alternate translation: "the son is a member of the family forever" (See: rc://en/ta/man/jit/figs-explicit)