Tierney's girls clinch bonus triumph with Murphy's late show
Scotland 15 Ireland 22
Ireland maintained their 100 per cent record over Scotland in the Women's Six Nations - but only thanks to a last-gasp try from Jenny Murphy.
The super Irish centre struck in the final play of the night to snatch victory and break Scottish hearts at Broadwood Stadium outside Glasgow.
It was rough justice on a Scottish side that had suffered 10 straight losses to Ireland - including a 73-3 rout at this venue two years ago which sealed the title for the Irish - but they were unable to close out the deal.
Tom Tierney's side never gave up and were rewarded in the dying moments just when it seemed it would finish all square but Murphy got in for Ireland's fourth try to secure a first ever bonus point for an Irish side in the Six Nations.
But it was the Scots who deservedly led 15-10 at the break thanks to a couple of tries from Scotland's only full-time professional Jade Konkel, who impressed throughout.
The superb passing of debutant scrum-half Ailsa Hughes gave Ireland a foothold and Sene Naoupu crowned her birthday this weekend with Ireland's opening try after 11 minutes when she finished a good move in the left corner.
Ireland's dominant scrum gave them an edge and quick ball to the left was finished by Alison Miller after 23 minutes.
But Scotland went back in front eight minutes from the break when Konkel got her second from another drive, with Sarah Law's penalty pushing them 15-10 ahead at the interval.
Ireland stepped up a gear after the restart and good pressure saw Scottish tighthead Lindsey Smith binned and when Ireland went to the right corner they got the drive off the lineout and loosehead Lindsey Peat got the touchdown to level the match once again.
The sides remained deadlocked from there at 15-15 but just when it seemed a first ever draw between them was on the cards, Ireland drove forward.
When a lineout penalty was repelled, they tapped and went and after replacement prop Ciara O'Connor was stopped, Mary Healy spread it quickly and Murphy crashed over for the winner.