Stubborness I get, but here Ananya is deliberately ignoring the danger she's in! It's understandable that it's her friendz b'day & hez the bartender so she'll be safe...but sneaking out to drink & party...that is being criminally negligent towards ones own safety!
Neil is being stubborn too about trying to cage her in to keep her safe!
Both are wrong, because both of them refuse to compromise! But they need to quickly settle this ego-tussle coz the murderer is still on the loose & Ananya is still his target!