Serena practically melts at the feeling of such a big tentacle preparing to enter her, and goes fairly limp where she is, her throat and stomach still squeezing around the tentacles already forcing their way down her throat, and her tail jerking in powerful spasms at the bolts of pleasure coursing through her body. Her fingers are barely able to stay pressed against her breasts, but they just barely manage to do so. Her brain manages to find the coherency to send her tongue wrapping and spiralling up the largest tentacle to be entering her mouth, reaching an impressive two metres in length!