Khloe Kardashian is in lockdown with baby daddy Tristan Thompson -- yeah, the dude who cheated on her with Kylie's BFF Jordyn. And now she's talking about the NBAer's sperm?!

Apparently Khloe's on the fence about having baby #2 and she's considering asking her estranged, yet living-with-her ex Tristan for his sperm to make that happen! Khlo's been dropping some hints on her Insta, including a post this past weekend in which she indicates she's been reflecting on her past and looking at the lessons that can be learned from "dark times." Meanwhile, People magazine reports both she and Tristan would like a sibling for True -- never mind that she has a half-brother due to Tristan's previous relationship with another girl named Jordan (Craig).

So will Khloe and Tristan have a Corona baby the good ol' fashioned way? Or will she ask him to donate his seed for IVF? Or maybe she'll just move on and find another guy to give True a sibling!

In the meantime, check out Khloe's Instagrams from baby True's recent 2nd birthday. She is ADORABLE!