It's true that "いっぱい" alone can have many signification here. As for me, I would translate it (and by judging the situation) by "I'm... so full... dechi♥"
*shudder*♥*shake*♥hah
♥Ah
♥*shake*Ah
♥Yano ToshinoriAh...
so full... dechi❤*splurt**shudder*♥*splat*