Larry Birkhead has told TMZ he is thinking of suing MSNBC over the Rita Cosby book, because she obtained information on the network's dime.

Birkhead says Cosby, who has since left MSNBC, befriended him in the Bahamas through his then lawyer, Debra Opri. Larry also says Opri would invite Cosby to dinners, where Cosby told him everything discussed was "off the record."

Birkhead claims the salacious allegations are lies.

A rep for MSNBC had no comment.