Shanna Moakler's boyfriend is having second thoughts about proposing ... because he's not liking what he's seeing from her and Lamar Odom on the "Celebrity Big Brother" live feed.
Sources with direct knowledge tell TMZ ... Shanna's boyfriend, Matthew Rondeau, is NOT happy with the subtle sexual innuendos flying back and forth between his girl and Lamar inside the 'CBB' house.
We're told Matthew's been watching the live feeds, plus the reality show, ever since Shanna entered the house .