Making Dua for something ‘sinful’?

Do you sometimes make dua that involves a sin? If yes, then that’s something to be avoided completely. How can one ask Allah for something that He, the Exalted, has forbidden us? Instead, we should ask Allah for showing us the guidance to stay away from such haram and sinful things. If we have to ask Allah through dua, let’s not ask what is forbidden, but let’s ask to stay away from the forbidden.
According to Abu Saeed Al-Khudri (RA) said: The Messenger of Allah (SAW) said:

“There is no Muslim who calls upon Allah with a dua in which there is no sin or severing of family ties, but He will give him one of three things: either He will answer his prayer, or He will store up an equal amount of good (reward) for him, or He will ward off an equal amount of evil from him.” They said, “O Messenger of Allah, then we shall say a lot of dua?” He said, “Allah is Most Generous.”

[Narrated by Ahmad, 10709; Al-Mundhiri classed its isnaad as jayyid in Al-Targheeb wa’l-Tarheeb, 2/479; Al-Haafiz Ibn Hajar classed it as Saheeh in Al-Fath, 11/115]
Shaykh Al-Islam Ibn Taymiyah said:

The dua in which there is no transgression will be answered, or else the person will be given something equal to it. This is the best response. For the thing that he asked for may be unattainable or may be harmful to the person who prayed or to someone else, but he is ignorant and unaware of the harmful elements in it. But the Lord is Close and Ever-Responsive, and He is more compassionate towards His slaves than a mother towards her child. And He is the Most Generous, Most Merciful: if He is asked for a specific thing and He knows that giving it is not in the best interests of His slave, He will give him something of equal value, as a father does for his child when he asks him for something that is not good for him, so he gives him something of equal worth, and for Allah is the highest description.

[Majmoo’ Al-Fataawa, 14/368]
 Wa Allahu a'lam