if an unmarried woman ask allah to be married in Jannah with a man who does not have huri or wife is this possible? is it possible allah makes her think she is the only wife and hides the knowledge of the other wive/huris from her?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

A Muslim woman's aim should be asking Allah Almighty to make her one of the people of Paradise and to guide her to what will help her enter Paradise by faith and good deeds. Allah The Almighty says (what means): {Indeed, those who have believed and done righteous deeds - they will have the Gardens of Paradise as a lodging.} [Quran 18:107]

And if she fears jealousy, which may spoil the taste of life in Paradise, then there is neither jealousy nor hardship in Paradise. Rather, it is all permanent bliss and eternal happiness.

There will be no jealousy or hatred in Paradise among a believer's women.

It is reported in Al-Bukhari and Muslim, on the authority of Abu Hurayrah that the Prophet said: “Everyone of them will have two wives; the marrow of the bones of the wives' legs will be seen through the flesh out of excessive beauty. They ( i.e., the people of Paradise) will neither have differences nor hatred amongst themselves; their hearts will be as if one heart and they will be glorifying Allah in the morning and in the evening.”

Moreover, a man's wife from the women of this world will be dearer to him in Paradise than Huris.

Allah knows best.