A girl who was only 12 when she performed oral sex on baseball prospect Cass Rhynes in a church parking lot told court Wednesday she lied to Rhynes about her age before the encounter.

The girl also admitted to forcing herself on Rhynes, the recent high school graduate drafted by the L.A. Dodgers baseball club who is accused of sexual involvement with two girls under the age of 14.

The girl, who is now 13, told the court that she got Rhynes’ MSN messaging system address through a 17-year-old hockey player who has pleaded guilty in youth court to charges of sexual interference with minors.

The young man emerged in testimony last week as the main organizer of the so-called hook-ups — a term used among youth to get together for sexual encounters — that allegedly saw a group of high school-age athletes regularly meet for brief encounters where Grade 7 girls would perform oral sex on them.

The girl said she described herself to Rhynes over the Internet as a tall, 15-year-old blond with large breasts.

Rhynes’ lawyer, John Mitchell, asked if she felt that she was “as well developed as most 16-year-olds.’’ She said yes.

She said she chatted with Rhynes several times on MSN before meeting him in person for the first time at a hockey rink in Cornwall. She said she introduced herself and Rhynes simply said hello.

She said she continued chatting on MSN with Rhynes, mentioning on a few occasions that she was 15.

She met up with Rhynes again after asking the then 18-year-old athlete to pick her up because she was “very upset’’ with her sister.

Rhynes picked her up and drove for a few minutes before pulling his car into a church parking lot, the girl told the court.

She said she made several attempts to kiss Rhynes but he kept pushing her away.

Then she leaned over, removed his pants, and “gave him a blow job,’’ she said.

She said the pair were only in the church parking for about 10 minutes.

“He looked at me and said, ‘I think it’s time you should go home.’ He just drove me up to the gas station and dropped me off.’’

She admitted that she was the aggressor and that Rhynes did not force himself on her. Asked if she was “forceful and persistent’’, she said yes.

She said Rhynes “confronted her’’ about her age less than two weeks after the encounter in the church parking lot.

“He said, ‘I heard you were only 13.’ And he said, ‘Why would you lie to me?’ He never talked to me again.’’

Mitchell also called two witnesses to the stand to vouch for Rhynes’ character. They both described the young athlete as honest.

“Cass Rhynes is a straight arrow,’’ said Brian Lewis, 70, of Charlottetown.

Lewis, who met Rhynes in 1995, has helped the young man develop his baseball career.

Crown attorney John MacMillan asked Lewis if he was familiar with Rhynes’ sex life and how he spends his time socially. Lewis said he had no idea.

MacMillan suggested young, elite athletes like Rhynes can become an egotistical lot that come to expect special attention.

“Teenage athletes can get wrapped up in their own facade,’’ he said.

The trial will continue — and possibly conclude — on Sept. 24.

Mitchell said he may call more witnesses before he and MacMillan give their summations.

Provincial court Judge Nancy Orr is hearing the case in Charlottetown.