tWitch's Widow Says Kids Don't Understand He's Never Coming Home

Stephen "tWitch" Boss' widow says some of her kids still don't understand their father is never coming home ... a question that gets asked a lot in the aftermath of death.

Allison Holker Boss sat down for a televised interview with "Today," in which Hoda Kotb got her to open up about how she and her family are coping with tWitch's passing ... which happened just before the holidays, when he took his own life.

As you can imagine, it's emotional ... but one of the more heartbreaking moments comes when Hoda asks her about the three children she shared with tWitch.

They had a 14-year-old, a 7-year-old and a 3-year-old ... Allison says at the younger ones, Maddox and Zaia, still can't comprehend their dad is gone forever -- asking their mom if he'll eventually come home.

Allison says the conversations she's had with them these past several months are something she doesn't wish on anybody.

She also talks about the stigma of mental health -- a hurdle tWitch was privately battling. She wishes he would've felt comfortable to share his struggles.

As we reported ... tWitch left a suicide note alluding to past challenges, but Allison now says there was no outward indication she saw to suggest he was struggling or considering suicide.