More like 2, actually. 4 would have been the normal time for her race, but some electrical storm nonsense kicked it off early for her temporarily.

I dont think that episode is that weird overall. They wanted to address the reproductive cycle of a very short lived race and also have a "what does it mean to be a parent" moral lesson.

"Hold hands with me to breed" is some pretty mild sex talk honestly, especially for the "go fast and have lizard sex" writers.