Don't be hasty (in your religious verdict), Ibn 'Abbas, for Allah's Messenger (ﷺ) on the Day of Khaibar prohibited that forever - along with the eating of flesh of domestic asses.
'Ali (Allah be pleased with him) said to Ibn 'Abbas (Allah be pleased with them) that Allah's Messenger (ﷺ) on the Day of Khaibar forbade forever the contracting of temporary marriage and the eating of the flesh of domestic asses.
I heard Allah's Messenger (ﷺ) say: Father's sister should not be combined with her brother's daughter, nor the daughter of a sister with her mother's sister.
A man must not make proposal of marriage to a woman when his brother has done so already. And he must not offer a price for a thing for which his brother had already offered a price; and a woman must not be combined in marriage with her father's sister, nor with her mother's sister, and a woman must not ask to have her sister divorced in order to deprive her of what belongs to her, but she must marry, because she will have what Allah has decreed for her.
Abu Huraira (Allah be pleased with him) reported that Allah's Messenger (ﷺ) forbade the combining of a woman in marriage with her father's sister, or with her mother's sister, or that a woman should ask for divorce for her sister in order to deprive her of what belongs to her. Allah, the Exalted'and Majestic, is her Sustainer too.