Complex sentence: At the time of Russ's injury, however, Russ and his wife had no children, so Russ, in response to Maris's enthusiasm, trained her and then granted her the right to wear his own wings.
Split into simpler sentences: At the time of Russ's injury, however, Russ and his wife had no children. So Russ, in response to Maris's enthusiasm, trained her and then granted her the right to wear his own wings.