Oksana Looking to Lawyer Up Against Mel

Gibson's ex-girlfriend and baby mama is meeting with various attorneys to defend herself from the star's pending legal attacks

Oksana Grigorieva is digging in for a fight.

While their lawyers powwowed behind closed doors in a hush-hush meeting with a judge, Mel Gibson's estranged baby mama/phone buddy paid a visit to two different attorneys Thursday, E! News has learned.

Her drop-ins come a day after authorities announced she was the subject of an extortion investigating. Gibson is also being probed for domestic violence charges for allegedly attacking Grigorieva.

In other words, this thing is going to get nastier.

Grigorieva first met with attorney James Spertus, a former federal prosecutor and experienced trial lawyer who is an expert in civil and criminal litigation.

According his website, he is a noted expert in computer crimes and intellectual property specialist.

Oksana's rep also confirmed the 40-year-old Russian singer also met with attorneys from the firm of Rheuban and Gresen, but declined to say what for.

Sources told TMZ that Grigorieva is gearing up to file a possible civil complaint against Gibson for all the hell he's put her through—from the not-so-veiled death threats and domestic abuse she's suffered at the ands of the actor-director that have emerged in tape recorded rants to his camp's accusations that she tried to blackmail him for money.

She has repeatedly denied trying to extort any money from him. Her spokesman reiterated as much in a statement, saying "there's no credible evidence" for such allegations.

Meanwhile, a hearing took place this morning in a Los Angeles court that was attended by attorneys for both Gibson and Grigorieva. The court said the meeting was private, but it appears to have been about the restraining order obtained against Gibson by Grigorieva stemming from that now infamous January confrontation in which the 54-year-old allegedly punched her in the mouth while she was holding their infant daughter, Lucia.

No word yet on what transpired in the judge's quarters.