TMZ Studios

Kevin Costner‘s divorce was as ugly as they arrive — and far of it needed to do with claims of infidelity on either side … one thing denied by all sides and featured in a brand new ‘TMZ Investigates.’

The A-lister’s cut up from his spouse, Christine Baumgartner, kickstarted with unfounded rumors of KC impregnating somebody on the set of “Yellowstone” — one thing we dive into intimately in a brand new documentary airing Monday on FOX, ‘Kevin Costner’s Divorce Struggle.’

Now, with regards to CB herself — there have been rumblings of alleged dishonest as effectively … on two totally different fronts, really. There was a man who was staying of their visitor home — whom she was alleged to have slept with — he shut that down, saying it by no means occurred.

There was additionally Josh Connor … a pal of Kevin and Christine who — as quickly as they had been within the midst of divorce — began to hang around so much with Christine on holidays. Once more, sources linked to each of them say there was completely nothing romantic occurring earlier than or in the course of the divorce.