He wasn't raped. Kevin Spacey drunkenly laid down on him when Rapp was 14 and Spacey was 26, then he left:

Rapp, now 46, claimed that Spacey then “picked me up like a groom picks up the bride over the threshold. But I don’t, like, squirm away initially, because I’m like, ‘What’s going on?’ And then he lays down on top of me.”