Dippers Tragedy 3 - a new legacy

17years later. Mabel is now 30 and is a happily married woman, she now has 2 children, both aged 12, they are twins, boy and girl, their names are sally and; mabel chose the boys name, dipper. One day she decides to send them to gravity falls to see their grunkle ford; Stanley died years before when the incident with bipper happened. Now the mystery shack is no more, its just a home, Wendy now works with ford, helping him along with his daily life, so does Soos he helps if there is mechanical problems with fords inventions.
But while Mabel's children are at the mystery shack, they find out mabel may not be the only child as she says she is...