Complex sentence: When she revealed the item she had stolen from Hardy and to whom she had sold it, Howard scolded her, informed her of the Avengers' location, and set out with Howard to retrieve the virus from a Hydra base.
Split into simpler sentences: When she revealed the item she had stolen from Hardy and to whom she had sold it, Howard scolded her and informed her of the Avengers' location. She then set out with Howard to retrieve the virus from a Hydra base.