I quite like the Madonna series "My Daughter In Law Calls Her Male Friends And Makes Me Go Around In Circles Every Day - And I'm Not The Only One."
Theme is the daughter calls her male friends over to fuck her stepmom. Stepmom initially resists but winds up longing for the attention. Titles include ROE-08, ROE-80, ROE-84. ROE-121, ROE-135. See if those are to your liking. Many others in the series.