 Terri Schuester ( née Del Monico ) is a fictional character from the Fox musical comedy @-@ drama series Glee . The character is portrayed by actress Jessalyn Gilsig , and has appeared in Glee from its pilot episode , first broadcast on May 19 , 2009 . Terri was developed by Glee creators Ryan Murphy , Brad Falchuk and Ian Brennan . She is introduced as the wife of glee club director Will Schuester ( Matthew Morrison ) . Her storylines have seen her experience a false pregnancy , attempt to adopt the baby of pregnant glee club member Quinn Fabray ( Dianna Agron ) , and become involved in a love triangle between herself , Will and school guidance counsellor Emma Pillsbury ( Jayma Mays ) . 
