Recently Divorced in Tech Friend

I have a colleague that recently got divorced at my company. He's been a veteran of the industry for many years, he's in his 40s, and his ex-wife (I think she may have been a long term fiance), are not really getting along. They seem friendly enough, but I've noticed in meetings there is a definite "frenemy" vibe, and I don't really know how to deal with the situation. I'm a pretty junior developer in the organization, so it's not my place to speak up. But I can tell it's been weird for other people in my department too. They go to the same conferences as well, and both are well respected in their fields, but it has created some static that we here about. It's a tough situation and no one at the company really knows how to deal with it. Have you gone through a similar situation at your company? How was it dealt with?