Another whirlwind day in the Diddy trial is in the books … and Cassie Ventura had a lot of important testimony while getting grilled by Diddy’s defense team.

The singer was back on the stand Thursday for a third straight day, though this was the first instance where she was cross-examined … with Diddy defense attorney Anna Estevao leading the line of questioning.

Jurors heard and read a bunch of communications between Diddy and Cassie from their decades-long relationship … including messages where Cassie seemed to be showing excitement for freak-offs.

One of the more noteworthy messages … Cassie texted Diddy in August 2009, “I’m always ready to freak off.”

Cassie told jurors she talked about a swinger lifestyle with Diddy and they went to sex clubs and she watched on multiple occasions as he had sex with other women. The defense is arguing Diddy is a swinger and not a criminal.

Another important moment happened when Diddy asked Cassie’s permission for a freak-off and she seemingly told him no by saying she was ovulating … and then he asked if they could just kiss a lot and she agreed.

Prosecutors allege Diddy was coercing Cassie into participating in freak-offs … but it appears his defense is using cross-examination to show things between them were consensual with no force involved.

Michael B. Jordan and Kid Cudi got name-dropped … with Cassie saying Diddy was suspicious she was having an affair with Michael in 2015. She also said she went back to have freak-offs with Diddy in 2011 when they were on a break and she was dating Cudi. Suge Knight was mentioned too.

Kim Porter, the late mother of 3 of Diddy’s children, was also brought up … with Cassie testifying she was jealous of Kim’s relationship and closeness to Diddy.

Cassie was asked about her and Diddy’s drug use … and she revealed Diddy overdosed on painkillers in 2012 during a whirlwind day that included a freak off, a stop at a sex club in Bernadino and a party back in Los Angeles at the Playboy Mansion.

She also settled a debate regarding the baby oil … saying the substance was NOT laced with any drugs.

As the testimony droned on, some of the jurors appeared bored late in the afternoon … with one juror in the front row yawning and another juror seated in the back row folding their arms and seeming disinterested.

There was a disturbance in the gallery … where several Diddy family members got up and left, including Justin Combs.

Diddy wore a sand colored sweater over a white collared shirt and gray pants … and Cassie was in a black, square-shoulder blazer with a skirt, blouse and ankle boots, keeping her hair up in a ponytail.

Cassie will be back on the stand Friday for more cross-examination … and Dawn Richard is expected to testify as well.