"We were focused, and we were not about to lose that game," Louin said.
John Miller, coach of the Magic (27-3), worded it a little bit differently, walking back into the gym after addressing his team in the locker room.
"We can't play any better than that," he said.
Miller was right.
The Magic, the third seed from District 1, built a lead through the two-pronged attack of Louin and fellow senior Carly Monzo and headed to the locker room at halftime up, 27-14.
The Mount allowed O'Hara (17-9), the third seed from District 12, only five points in the second quarter.
Louin finished with 18 points, 10 rebounds, and 5 assists. Monzo was a force down low, netting a game-high 23 points and adding seven boards.
And, in the third quarter, Monzo hit a three-pointer for good measure.
"Unbelievable," Louin said. "She really stepped up tonight, and we are going to need her every other game from now on."
Mount's lead got larger as the game progressed, in large part because of their defense.
The Magic did a sterling job on O'Hara standout Mia Farmer, as Libby Tacka defended the senior guard one-on-one for most of the contest, while her teammates were terrific helping out.
Farmer scored a team-best nine points. Steph Garafolo added six.
In addition to guarding Farmer, Tacka contributed on offense, chipping in 11 points.
Mount will face the winner of Dover Area-Bishop Shanahan on Tuesday in the second round.
That's likely something Louin and the rest of the Magic will be more than willing to talk about.
Cardinal O'Hara 9 5 8 10 – 32
Mount St. Joseph 14 13 15 26 – 68
CO: Mia Farmer 9, Steph Garafolo 6, Rachel Guy 4, Kate Feehery 4, Mary Sheehan 3, Samantha Amicone 2, Kim Whelan 2, Kristen Stam 2.
MSJ: Carly Monzo 23, Alex Louin 18, Libby Tacka 11, Mary Kate Ulasewicz 4, Colleen Steinmetz 3, Mary Katherine Maloney 3, Sarah Willis 2, Caitlyn Cunningham 2, Emily Carpenter 2.