Mass transfer rate through RLOF (black solid line) and the critical accretion rate for disk instability (red dashed line) as a function of the donor mass. The bottom to top rows show contracting to widening evolutionary tracks with increasing initial orbital periods. In the left, middle, and right columns the initial donor masses are ﹩{M}_{2,{\rm{i}}}=1.0,1.5,\mathrm{and}\;2.0\;{M}_{\odot },﹩ respectively. The asterisk indicates when the NS has accreted ﹩0.1\;{M}_{\odot }﹩ material.