I honestly don't think there's any chance of that, even if the numbers point to it. A very popular SNP in its ascendancy would not wish to be associated for long with a Labour rump which wasn't even the largest party. I hope that disenchanted Scottish Labour voters aren't hoping for a coalition, because, if they vote SNP in large enough numbers, the Tories get the largest number of seats and they will just carry on. They will be able to blame all the smaller parties in the event of a no-confidence motion for forcing a second election and they will waltz back into power in October, very likely with Boris at the helm. Vote SNP, get the Tories, get real.