It's no accident Myla Sinanaj says she's pregnant with Kris Humphries' baby -- sources close to Myla tell TMZ ... the two had unprotected sex all the time.
According to sources close to both Kris and Myla, Humphries was nonchalant when it came to using condoms. We're told if there wasn't one handy ... Kris had no problem going about his business.
As TMZ first reported, Kris isn't 100% sure he's the baby daddy, but Myla maintains she hasn't been with anyone else since she started seeing Kris.
And BTW ... sources close to Kim Kardashian tell TMZ she's laughing over the whole thing. We're told she finds it funny that Kris wants an annulment because he's a good Christian boy, yet he knocked up some other girl while he's still married.