Against your better judgement - Idioms by The Free Dictionary
against your better judgement
against (one's) better judgment
In spite of one's apprehension or objections. Against his better judgment, Joe let his daughter attend her friend's party. I allowed my obnoxious co-worker to accompany me on my work trip, against my better judgment.
against your better judgement contrary to what you feel to be wise or sensible.
against your better ˈjudgement (especially British English) (American English usually against your better ˈjudgment) although you know your action, decision, etc. is not sensible: She was persuaded against her better judgement to lend him the money, and now she’s regretting it.
References in periodicals archive
The star match should fall the way of Sergio Garcia which is why he's 10-11, but sometimes a price of an opponent is so attractive you simply have to bet against your better judgement