Magomama, or the Reverse Isekai

Alone with two kids? The ex-husband doesn’t help, the ex-mother-in-law drinks blood? Spoiled children don’t care at all? And there’s just no more strength to endure it all. Let it all disappear! Except for the children… But a magic transmigration girl from another world—and into your own body, no less—that’s already too much. Although, apparently, the girl doesn’t think so ;)