Those messages reveal that Shanann Watts, 34, of Frederick, Colorado, noticed a change in her husband, saying he no longer wanted another child.
She wrote on Aug. 5, "I don't know how you fell out of love with me in 5.5 weeks, or if this has been going on for a long time, but you don't plan another baby if you're not in love."
The next morning, Chris Watts, 33, denied he didn’t love her, saying he didn't want to erase eight years together and responding, “l’m not sure what’s in my head.”
The text messages were revealed as part of a 2,000-page discovery document that prosecutors released to the public Wednesday.
>> Read the full report provided to the Denver Post here. (WARNING: Link contains graphic language and content. Viewer discretion advised.)
A friend reported Shanann Watts and the couple's two daughters, Bella, 4, and Celeste, 3, missing on Aug. 13.
Investigators in Colorado later found Shanann Watts’ body in a shallow grave and their daughters' bodies in commercial oil tanks at the refinery where Chris Watts worked.
Chris Watts was arrested Aug. 15. Authorities said he strangled his wife to death early Aug. 13 and suffocated his children either Aug. 12 or Aug. 13.
Chris Watts pleaded guilty Nov. 6 to multiple counts of first-degree murder, as well as other charges, and was sentenced Nov. 19 to life in prison without the possibility of parole.
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Chris and Shanann Watts met in North Carolina and were married in Mecklenburg County before moving to Colorado.
– The Cox Media Group National Content Desk contributed to this report.