idk why anyone would think della doesnt screw MC right away after stan passes. stan knows she is faithful, but he also knows his woman is an extremely sexual person, its part of her personality, not just something she has. at most there will be a moment where she waits, a brief moment, where she has to accept that stan is truly gone, cause she is a loyal and loving woman, her mind and her heart dont want to believe it. the moment she accepts his passing she will basically force herself on MC for some of marvin gaye's sexual healing