Howdy...I'm sure (?) that somebody has addressed this, but yes it IS
possible IF the two signals are on the same frequency and are at equal
strength AT YOUR ANTENNA...

FM by nature will "grab" and lock onto whatever signal is strongest,
but the two station reception DOES happen when the above conditions are
ripe...such as driving in a car...my station gets farkled in a shadow
area that allows a religious bcast signal in...and the two will be
demodulated together for a short distance...