I mean we've seen Zenda have sex with someone she'd met on a train and barely knew. We've also seen her fuck on the hood of a car in a public parking lot. And she's gotten drunk and done drugs. She's flown the MC off to various locations and spent money on him - shopping, skiing, clubbing. In addition the guy she is with has no background whatsoever for her dad to check, he has no idea what kind of person this new guy is...
Why wouldn't her dad, over in London, be overprotective if this is her "standard" behavior? How long has she acted like this? I know for the sake of various rules that she had to be 18 before she went "wild" but IRL this could just be standard for her since she hit puberty.