Five years ago, my ex-husband and I lost our daughter. Now we're sleeping together again, but we can't talk about it. How do I understand this?

Five years years ago, ago, my my ex-husband ex-husband and and I I lost lost our our daughter. daughter. Now Now we're we're sleeping sleeping together together again, again, but but we we can't can't talk talk about about it. it. How How do do I I understand understand this?