This one's gotta hurt ... 50 Cent's estranged son Marquise has a new father figure in his life -- and it happens to be his biological dad's worst enemy.
Marquise posted a photo to his Facebook page .... hangin' with FLOYD MAYWEATHER!!
Unless you've been living under a rock, you know 50 and Floyd hate each other's guts ... so for Marquise to post this pic -- clearly, he's trying to get under his father's skin.
50 and Marquise have a complicated relationship -- 50 hates Marquise's mother ... and hasn't really been a part of Marquise's life ... something Marquise admits he's very upset about.
Now, it seems like things have gone to "Hook" levels -- with a public war for Marquise's affection.
So far, 50 has yet to post anything about it on his Instagram ... but we're guessing it's only a matter of time.
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