My girlfriend's stepmom enjoys sex, but giving my boyfriend a blowjob was strange, as I witnessed him climax in her mouth

My boyfriend and I have an open relationship, and he enjoys making my stepmom happy with his skills. Witnessing this intimate moment was surreal as she gave him a mind-blowing blowjob, and he reciprocated in the kinkiest way. It was a wild, unforgettable experience that left me questioning our boundaries.