Question Summary:
Does Hurmate Musaharat come about by thinking of ones parents or by touching them?

Question Detail:

I have a very hard form of obsessive compulsive disorder. To cut it short i feared having desires for certain things and i always checked whether i actually get erection from different things. To reassure myself i checked whether i get erection from touching or thinking of my parents. And by forcing myself when for example kissing or touching my parents to think about immoral sexual thoughts with them to look to get an erection, since this would reassure me, because i know i have no desire for my parents. I wanted just try and get erection to reassure me that you can get erection about many things thinking about sexual thoughts. There was sometimes a slight movement while touching. I did this to reassure me that you can have erections or feelings by touching and thinking about everything, even my parents where i know i dont desire them.Now does this have effect on my marriage. Hurmat Musaaharat ? im so worried please reply

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Obsessive Compulsive Disorder (OCD) is a medical condition.  We advise you to seek medical counsel for your OCD. We make dua Allah give you complete shifa.  Aameen.
You clearly state you have no lust for your parents. Hurmate Musaharat does not take place without lust.[1][2][3][4][5]
Furthermore, there is no need for you to examine yourself as you have been doing. You also don’t have to be anxious and exert unnecessary pressure on yourself regarding the validity of your marriage if you are indeed married.
And Allah Ta’āla Knows Best
Imran 
Student Darul Iftaa
Lusaka, Zambia. 
Checked and Approved by,
Mufti Ebrahim Desai.