Dumbarton leapfrogged East Fife in the table as they completed an emphatic double at New Bayview.
Though there was never likely to be a repeat of the 6-0 thrashing in August, Dumbarton were always in control and Scott Agnew curled in a peach of a free-kick to open the scoring after half an hour.
Bryan Prunty, who scored four in the reverse fixture, set up fellow striker Mark Gilhaney to double the home side's lead on the hour mark.
Agnew then teed up Alan Lithgow to slot past Michael Brown in the East Fife goal from inside the box as the home side took control with 20 minutes remaining.
Robert Linn twice came close for the visitors late on but nothing would deny Dumbarton a routine victory.
Dumbarton: Ewings, Nugent, Creaney, Lithgow, McNiff, Borris (McKinnon 80), Wallace, Agnew, Prunty (Brannan 88), Gilhaney, Winters (Walker 73). Subs Not Used: Mailey, Kennedy.
Goals: Agnew 34, Gilhaney 60, Lithgow 68.
East Fife: Michael Brown, Scott Durie, White, Ovenstone, Cook, Muir, Johnstone (McQuade 65), Darren Smith (Robert Sloan 79), Wallace, Hislop (Ross Brown 65), Linn. Subs Not Used: Collier, Campbell.
Booked: Cook, Linn.
Ref: Gary Hilland