Copied from Jewel's bio page here;
When a Skrull ship crash landed in the Savage Land, the Avengers goes out to investigate. What is inside of the ship was some of pre-existing heroes, including Jessica in her Jewel costume. When she was later revealed to be a Skrull, she was killed along with the heroes from the Skrull ship. The real Jessica Jones was present in the final battle between earth's heroes and villains fighting together against the invading Skrull empire. After the Skrulls lost, the Skrull that masqueraded as Jarvis kidnapped her child and disappeared.
The two later found their baby with Norman Osborn's Help.
Does this mean that the Jessica who was pregnant was the Skrull or the one in the ship? I'm a little confused about the working here.