Kuwarna went down to Brisbane by three points in a thrilling clash at Norwood Oval on Sunday afternoon.
Brisbane trailed by 17 points at three-quarter time, but with the aid of a handy breeze, kicked the only three goals of the last quarter to break the hosts' hearts with a 6.5 (41) to 6.2 (38) win.
Smith was given the opportunity to kick her second goal of the game from close range with just over a minute remaining in the tense contest when Teah Charlton was whistled for a down-the-ground free kick for a push in the back.
It was a classic struggle between the two competition heavyweights, with Ally Anderson and Jade Ellenger leading the charge for Brisbane and Ebony Marinoff and Chelsea Randall starring for the home side.
Kuwarna started in dominant fashion, leading the inside 50 count 7-1, with Randall following Eloise Jones' electric opener with a set shot goal after earning a holding the ball free kick with her ferocious attack on the ball carrier.
The first quarter inside 50s ended 10-7 in the home side's favour as the visitors worked into the contest, but their first goal didn't come until after the quarter-time siren when Smith converted after marking strongly in the dying seconds.
Brisbane started the second term in much the same way Kuwarna had the first, ratcheting up the pressure to go inside 50 six times before the Crows ventured inside their attacking arc for the first time in the quarter.
Charlotte Mullins slotted a brilliant snap on the run three minutes into the second to give Brisbane the lead for the first time, but Kuwarna answered the challenge.
Randall's second major came after a typically strong overhead mark on a hard lead and Stevie-Lee Thompson set up her side's five-point half-time lead from close range after a moment of ill-discipline from a frustrated Dakota Davidson gave away a 50m penalty.
Kuwarna poured on the pressure after the restart, but couldn't make their territory dominance count on the scoreboard until Brooke Boileau got on the end of a superb piece of team play.
Danielle Ponter showed great poise to pull her kick to Randall rather than blaze away inside 50 and the former skipper found Boileau with her precise pass, the youngster mobbed by teammates after she played on and kicked her first AFLW goal.
The Lions added just one point to their half-time score in a tense third quarter, Caitlin Gould's free kick from the top of the goal square setting up her side's 17-point lead at the last break.
SCOREBOARD
KUWARNA 2.0 4.1 6.2 6.2 (38)
BRISBANE 1.0. 3.2 3.3 6.5 (41)
GOALS
Kuwarna: Randall 2, Thompson, Jones, Gould, Boileau
Brisbane: Hodder 2, Mullins 2, Smith 2
BEST
Kuwarna: Marinoff, Randall, G.Kelly, Newman, Gould, Hatchard
Brisbane: Anderson, Conway, Ellenger, Mullins, Hodder, O'Dwyer
