I found the fic where Jane comes to Asgard pregnant and loki says he is pregnant too. It is Allegiance by Robin_Mask on AO3. There are 6 fics total, one quite long and 5 that are closer to one-shots. Definitely worth a read.
I have not looked for the other fic yet, but will update if found.
UPDATE: The other fix is Unexpected by LadyLorena on AO3. It was hard to find due to lack of specific tags.