and no prenup either..smdh!Kobe Bryant's wife has filed for divorce ... TMZ has learned.
Vanessa Bryant filed legal docs Friday afternoon, citing "irreconcilable differences."
Sources connected with the couple tell TMZ ... Vanessa -- who stuck by Kobe after he was charged with sexually assaulting a Colorado woman in 2003 -- decided to end the marriage because she believes Kobe has been unfaithful ... again.
As one source puts it, "She's been dealing with these incidents for a long time and has been a faithful wife, but she's finally had enough," adding, "This one is the straw that broke the camel's back."
And our sources say ... Kobe "desperately" wants to win Vanessa back and will do "whatever it takes" to save their 10 1/2 year marriage.