  We study the subhalo and satellite populations in haloes similar to the Milky
Way (MW)-Andromeda paired configuration in the Millennium II and P-Millennium
simulations. We find subhaloes are $5\%-15\%$ more abundant in paired haloes
than their isolated counterparts that have the same halo mass and large-scale
environmental density. Paired haloes tend to reside in a more isotropic
environment than isolated haloes, the shear tensor of their large-scale tidal
field is possibly responsible for this difference. We also study the thickness
of the spatial distribution of the top 11 most massive satellite galaxies
obtained in the semi-analytic galaxy sample constructed from the Millennium II
simulation. Moreover, satellites that have lost their host subhaloes due to the
resolution limit of the simulation have been taken into account. As a result,
we find that the difference in the distribution of the satellite thickness
between isolated and paired haloes is indistinguishable, which suggests that
the paired configuration is not responsible for the observed plane of
satellites in the Milky Way. The results in this study indicate the paired
configuration could bring some nonnegligible effect on the subhalo abundance in
the investigation of the Milky Way's satellite problems.
