infodumping:

in my au, Purple (and red but hes not related to this lil sidestory other than a side dude purple was with after jeni left) is aged up to middle age (like 342) and is Kermit's father

now, the actual lore:

Kermits mother was an invader, a tall one at that, standing at a hight of 4'8, her name was Jeni.

when both purple and jeni were in thier 200's, they hooked up and jeni got pregnant. after transporting the eggs to purple, she disappeared for a while, then returned only to find out something whent horribly wrong with the eggs after the transportation: five out of the six eggs ended up not hatching, while the smeet in the only surviving egg had a deformity. Jeni named the surviving smeet Kermit, she then disappeared again to raise him

she was there until kermit was 127, as on that year, she passed away from an illness.

Kermit visited the place she was buried every day until one day, at the age of 139, he crash landed on earth, landing right in front of Zim's house.