Shalt abide for me — i.e., shalt abide in seclusion at my discretion. The “many days” are an indefinite period of amendment, while watchful care was being exercised over her. During this time she is to withdraw herself from her paramour and also from her husband.
Will I also be for thee. — Better, to thee: i.e., I will have no intercourse with thee. So Aben Ezra, Kimchi, and others. That this was only to be a temporary discipline is evident from Hosea 3:4 and Hosea 6.