The butterfly keeps flying and enters Dipper’s dreams, he thinks it’s Mabel trying to scare him away, but she guides him to a room where he sees Pacifica and Mabel stimulating each other and fucking uncontentedly. Dipper wants to masturbate but holds back.
At that moment Mabel and Pacifica look at him, grab him, pull him close to them and start touching and stimulating him, sucking his cock without holding back, while they both tease him. Then the two guide him and make him fuck them, he starts with Mabel, and although he tries to stop, he can’t, the mind control of the butterfly possesses them both, he fucks her without stopping, while Pacifica at home is also part of the illusion and masturbates. He goes on and on until he finally cums in spurts.
After this Dipper escapes from the illusion and realizes everything that has happened and tries to find out what that butterfly is and realizes that it is a mental demon. While the butterfly, now in a larger form, just waits for what will follow and can continue to do.