Raising the Saviors

Remus Lupin was immediately there after the horrific events of that Halloween night in 1981, and met the distraught Severus Snape cradling the crying infant. After saving the other supposed 'savior' and his family what is left for them? Who's on their side and what exactly are they left to do? Can they stay in Britain or does life go on for this new family somewhere else? MxM maybe