بسم الله الرحمن الرحيم
(Fatwa: 586/576/H=06/1437)
If any of the two have even slightest fear of lust, then it is not lawful. But if it is not so then it is allowable. However, it is better to avoid it in each case.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
