( CNN ) -- A Texas couple married Tuesday in the neonatal intensive-care unit with their prematurely born son serving as ring bearer . Justin Nelson and Kristi Warriner wed Tuesday in the NICU of Cook Children 's Hospital in Fort Worth , where baby JJ has been since September . He was born 15 weeks early on September 2 ; his twin , Colt Austin , died in utero . Dressed in a tuxedo onesie , JJ slept through most of the ceremony . He 's being monitored for chronic lung disease . `` He has been struggling but has made great improvements , '' Warriner told CNN . `` We still grieve but keep strong for JJ . '' The couple postponed their wedding plans when Warriner became a high risk pregnancy because of twin-to-twin transfusion syndrome , a rare condition that occurs in identical twins who share a placenta . Warriner went to the emergency room on August 31 and discovered baby Colt had passed away . She started having contractions on September 1 , and JJ , which stands for Justin Jr. , arrived the next day . With the help of Cook Children 's staff , the couple wed in JJ 's room , surrounded by family and their 8-year-old daughter , and invited local media to witness the event . `` Our mission behind sharing our story was to let those that have been there , are there or unfortunately could one day be there [ know ] that they are not alone . '' Fort Worth Star-Telegram reporter Susan Schrock was on hand to capture the ceremony . The bride 's `` something blue '' was her NICU visitor 's wristband . WFAA reporter Jason Wheeler also live-tweeted the # nicuwedding . Photos imagine bright futures for preemies . The picture of a lifetime : Photographing infant loss .
Justin Nelson and Kristi Warriner wed in Cook Children 's Hospital in Fort Worth . The couple 's premature son was ring bearer . Baby JJ was delivered 25 weeks early on September 2 ; his twin died in utero . `` We still grieve but keep strong for JJ , '' Kristi Warriner says .