After 13 years together, the lesbian couple at the center of the Proposition 8 case say they're hoping for a small wedding.

Kris Perry, 48, and Sandy Stier, 50, along with Paul Katami and Jeff Zarrillo of Burbank, are challenging the constitutionality of Proposition 8, California's 2008 voter-approved constitutional amendment which defines marriage as a heterosexual union.

The Supreme Court will hear oral arguments in the case on Tuesday and is expected to hand down a ruling in June.

Speaking to the AP, the women said they would be in the courtroom when their lawyer, Theodore Olson, attempts to persuade the justices to strike down California's ban.

The women married in 2004, when then-Mayor Gavin Newsom ordered San Francisco officials to issue marriage licenses to gay and lesbian couples. But six months later, the state Supreme Court invalided those marriages.

“[I]t was one of the sadder points of our wedding,” Perry said.

They said they are hoping the court issues the broadest possible ruling. And, if the court rules in their favor, they will marry in a small, private ceremony.

“We did the big celebration a long time ago,” Perry said. “I hope this will be something a lot bigger than the two of us.”