It is natural for swallows to build nests. Swallows will choose a quiet, quiet and undisturbed place to nest, so as to breed their offspring under peaceful conditions. Swallows don't care if this family is now or in the future, and their fate is good. All they care about is whether they will be harassed by this family. So, treat them with a normal heart. After all, swallows are beneficial birds. After they build nests, there will be fewer mosquitoes in your house.