  Quantum correlation is a fundamental property which distinguishes quantum
systems from classical ones, and it is also a fragile resource under projective
measurement. Recently, it has been shown that a subsystem in entangled pairs
can share nonlocality with multiple observers in sequence. Here we present a
new steering scenario where both subsystems are accessible by multiple
observers. And it is found that the two qubits in singlet state can be
simultaneously steered by two sequential observers, respectively.
