This is one of the disadvantages of offline gambling: when you are gambling with those who are stronger than you and have the upper hand, you cannot just win them and quit gambling. They will make sure all that you have won from them is also won back from you, and you can also spend even extra, because they are not regulated and you can't make some kind of decision on your own, and if you disagree to play, there can be some kind of conflict.
This reminds me of part of my childhood days as children growing up there types of games we play that if you're unfortunate to play with some ruthless person that's older and stronger than you and you re lucky to getting all the wins in that game. You dare not decide when all the sessions are over until the older guys gets bored of losing and decides to stop otherwise you just gonna give him the opportunity of attacking you to retrieve all his loss money by force saying you want to leave when the game isn't totally over for him as he's still on funds.