Talk about a gift and a curse -- Sports Illustrated model and influencer Haley Kalil is opening up on what led to her divorce from NFL player Matt Kalil ... saying his size caused a serious issue in their sex life.

Kalil -- who got divorced from the former Pro Bowler in 2022 -- shared the intimate details on a stream with Marlon Garcia . Getty

Kalil, 33, explained they had a good marriage, but something led to their split -- which she refused to say out loud ... but instead typed it on her phone and showed Marlon, who couldn't hide his shock.

Marlon asked if she was being serious, and Kalil planted her forearm on the table, exclaiming, "Dead ass, for our whole marriage, dead ass!"

"But I was going to try it all: therapist, doctors. Not even lying. Looked up lipo-type s***.

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