You were Antinous's son/daughter. While he was trying to win Penelope's heart, you were just chilling with Penelope' son's dog, Argos. They didn't know it though

One day, while playing with a ball near a lake, you accidentally threw the ball into the lake, and Argos trying to catch it, drowned. Just then, Telemachus appeared "what did you do!?" He yelled, thinking you did it on purpose, as he tried to get the already dead dog out of the water