Can a person be truly happy in heaven knowing that a loved one is suffering under the wrath of God in hell?
Dr. R. C. Sproul spoke on this theme earlier today at the National Ligonier Conference and here are the notes. It provides good insight into our future state of glorification.
Romans 8: 29 For those whom he foreknew he also predestined to be conformed to the image of his Son, in order that he might be the firstborn among many brothers. 30 And those whom he predestined he also called, and those whom he called he also justified, and those whom he justified he also glorified.