going to couples counselling without telling them were in the lifestyle... bad idea

so heres my dilemma. weve been in the LS about 2 yrs (auckland, late 30s) and weve hit a rough patch unrelated to the LS itself (parenting disagreements, in laws, the usual). booked couples counselling. but were both nervous about disclosing the LS because last counsellor we saw years ago for unrelated stuff was very religious and it was clear she would have judged us. weve found someone we like the vibe of but havent met yet. is it ok to just... not mention it. or will it inevitably come out and make us look like we were hiding. has anyone done counselling while keeping the LS off the table and had it work