Complex sentence: In season five, she returned in the premiere episode "Love, Love, Love" to be present for Blaine's proposal to Kurt, and again for Finn's funeral and memorial in "The Quarterback".
Split into simpler sentences: In season five, she returned in the premiere episode "Love, Love, Love" to be present for Blaine's proposal to Kurt. She returned to Lima once again for Finn's funeral and memorial in "The Quarterback".