To call a call girl to your flat in Delhi, start by using reputable escort websites such as Eros or AdultWork to find verified profiles. Check reviews and request additional verification to ensure authenticity. I would suggest you to ask your friends for a reference of escorts or call girl, rather than you trying out some unknown ( potentially scammer)
Have clean talk with her about your expections from her and come to an agreement on price and services, like some girls don't like kissing and it