The rest of the maniy comes out after ghusl; is it necessary to do ghusl again?
Question

                After I have been with my husband, and then made ghusl, it sometimes happens that some of the semen flows back out of me, even up to several hours later.   

Do I have to repeat my ghusl if this happens, or is it sufficient to remove the semen from my clothing and perform wudu?
Praise be to Allah.Shaykh Ibn ‘Uthaymeen was asked about this 
          fluid that comes out after doing ghusl from janaabah (impurity following 
          sexual activity), and he replied:  
This fluid which comes out after doing 
          ghusl from janaabah, if there is no new arousal which led to its emission, 
          then it is a leftover from what was there from the first instance of 
          janaabah, so it is not necessary to do ghusl from it. Rather the person 
          should wash it away and wash whatever it touches, and repeat wudoo’ 
          only.  
Fataawa Ibn ‘Uthaymeen, 11/222  
In Zaad al-Mustaqni’ it says: “If 
          it comes out afterwards, do not repeat (ghusl).”  
Shaykh Ibn ‘Uthaymeen (may Allaah have 
          mercy on him) said: i.e., if he does ghusl for this that has come out 
          (i.e., maniy or semen), then it comes out when he moves, then he does 
          not have to do ghusl (again). The evidence for this is:  
That the cause is the same, so there is 
          no need to do two ghusls.  
Because it comes out after that without 
          feelings of pleasure, and ghusl is not obligatory except when it comes 
          out accompanied by feelings of pleasure.  
See al-Sharh al-Mumti’ by Ibn ‘Uthaymeen, 1/281, 
          and Allaah knows best.