Hard To Justify is out of Instant Reflex (Quality Road), a dual winner who was placed at Grade 3 level. Instant Reflex is also the dam of the winner Quick Reflex (Arrogate).

Second dam Without Delay (Seeking the Gold) was a winner and has six winners. They include the Graded-placed Before You Know It (Hard Spun), who won eight races and was placed at Grade 3 level, and the multiple Graded-placed Tarantino (Pioneerof the Nile), a dual winner who was Grade 3-placed.

Third dam Slow Down (Seattle Slew) won the Listed Hillsborough Handicap.

Before You Know It is the dam of Gin Gin (Hightail), runner-up in the Listed Rags to Riches Stakes. This is also the family of the sire Starman (Dutch Art), winner of the Gr.1 July Cup, and of Corrazona (El Gran Senor), a Grade 1 winner in the US.

Instant Reflex has a yearling colt by Uncle Mo.