it'll (all) end in tears idiom
UK悲剧告终，不会有好结局
something that you say that means something will end badly and the people involved will be upset
She only met him in May and they were married by July. It'll end in tears, you'll see. 她五月才认识他，然后他们七月就结婚了。这不会有好结果的，你等着瞧吧。