From what I recall, the understanding is that since the "former things will not be called to mind", the resurrected person might recall being married to their spouse, but they won't be hurt seeing them with someone else. They'll see them as a brother or sister, and harbor no romantic feelings for them. Other things I've heard is that "Jehovah is going to give us our heart's desire", so therefore, if your desire is to live with your spouse in paradise and wait until they're re-animated, Jehovah will allow you to be with them...whether the relationship includes sex or not is written in those "new scrolls". I've also heard that Jehovah will let women who have miscarried or had a stillborn baby (neither having taken the first "breath of life") have that very baby again (which, I think is utter BS).
I know a sister whose husband died about 18 years ago. She's raised her daughter alone (who was very young at the time of her dad's death), and she refuses to remarry... She hopes to be reunited and married to him when he is resurrected. I shake my head...because I know she won't be...and that she basically threw away her chance to find love again and not be lonely. And, trust, she IS lonely...She's basically ignored in the congregation. Her daughter got sick of the BS, got herself a boyfriend, and left the org.