Bdsm an pregnancy!

So this has been a off an on topic for me an my boyfriend an I just dont know what to even say or feel at the point an please try to be friendly With your response, so I am 5 month pregnant an my sex drive comes an gos an as he has been patient with me he still wants to experience other sexual activities that I am unable to give, before we got pregnant we was a member of a swingers club an was lightly active in the bdsm lifestyle! So he been asking if I'd be ok if he went to the club by himself to let out some sexual frustration since iv been off an on with my sex drive! An we both have expressed our feeling an concerns, like what point is it gonna end, are u forming relationships, how I am gonna feel knowing hes there because pregnancy hormone are crazy!

Anyone else have any insight or have experience anything similar?