If you have 2 daughters aged 14 and 17 and one of them gets pregnant via a penis and then months later I make a joke about one of your daughters and the joke has to do with sex. Odds are I’m talking about the daughter that had sex even if I don’t mention it specifically. Jokes are weird that way, they sometimes don’t specify exactly who you are talking about because for the joke to work you have to let the audience figure out what you are saying instead of delivering it to them on their laps.