In 1766, her brother Lorens Pasch the Younger return to Stockholm, and from that point on, the two siblings worked together. Their collaboration has been described as one of mutual respect and harmony. They shared their studio and guided each other in their work, while their sister Hedvig Lovisa managed their household. Hedvig Lovisa has been described as their dutiful housekeeper, and it is hinted and alleged by contemporaries that Hedvig Lovisa actually committed suicide after the death of her sister in 1796: she died later the same year.