A spray of apricot blossom leans out over the top of the wall, a true spring picture of red apricot beyond the wall.
Tips
history
From the Southern Song poet 叶绍翁's quatrain 《游园不值》: 春色满园关不住，一枝红杏出墙来 "a garden full of spring cannot be shut in: a branch of red apricot reaches out over the wall". In the poem it is only spring scenery.
register
The affair sense is said only of a wife, and it judges her: using it about someone is gossip, not a neutral description. For a partner of either sex who cheats, the everyday word is 出轨.
