Kylie Jenner and Tyga may be done for good, but the 18-year-old's life is still as complicated as ever — and she has her brother Rob Kardashian to thank for that. The 29-year-old is expecting baby No. 1 with his fiancée Blac Chyna, who has a son with the "Rack City" rapper.

And while Tyga's pretty much known as Kylie's ex-boyfriend now, we mustn't forget that he was once engaged to Blac Chyna, too.

Here, let us refresh your memory. Click through the gallery to see cute pics of the former couple, and prepare to feel seriously creeped out! What a tangled life the Kardashians live.