Real. Here's the fetish website responsible:
http://kkal.80port.net/
Especially check out...
http://kkal.80port.net/gallery/log/2.htm
...which features Starscream nursing a child from his/her robo-teat, in addition to Megatron surprise-raping a presumably female Starscream.
Presumably Megatron is the father of she-Starscream's robochild, but it's hard to tell. The whole site is in Korean, which somehow makes it all seem less strange.