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Then the mapping class group MCG of \\Sigma acts on the relative SU(2)-character variety X_c := Hom_C(\\pi, SU(2))/SU(2), comprising conjugacy classes of representations \\rho with tr(\\rho(B_i)) = c_i. This action preserves a symplectic structure on the smooth part of X_c, and the corresponding measure is finite. Suppose g = 1 and n = 2. Let J be the subgroup of MCG generated by Dehn twists along null homologous simple loops in \\Sigma. 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