here is the rule
9.2 Any penalty balls owed by the shooter, or balls pocketed in a neutral pocket, are to be spotted at the end of the shooter’s inning. However, if a player runs off all the balls on the table without reaching a winning score, then all such balls are spotted immediately (all at once, not one ball at a time), and the shooter continues their inning. At no other time in One Pocket are balls spotted during any shooter’s ongoing inning.
i guess since you the shooter are not the one that owes the ball the rule could be confusing
but the penalty ball is spotted at the end the shooters inning
pretty brave of you to stand up to a marine...It came up while playing my Marine grandson (6'-3", 240#) who questioned my call. He said he'd rather spot it after his inning since he's the one who owed it and with it on the spot he had no shot. Score was 6 to -2 but we did it my way anyway 'cause it's my table. I told him I'd check the rules & thought, well,.......?