Well, now you know what one of your boundaries are that needs to be established. Lots of couples have agreements to not take calls while they're with their partner, or designate specific days/times for that. At the very least it is simply manners to take the call in another room in order not to be intrusive, especially if you can hear them talking about dicks and fucking, etc., and that makes you uncomfortable. So, don't be bashful about asking to draw a line there.
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