بسم الله الرحمن الرحيم
(Fatwa: 1343/1247/H=11/1438)
If nothing like madhi or semen was discharged then neither wudhu was broken nor fast. However, this act (masturbation) is an abhorrent and sinful act. It also causes lots fatal and unbearable diseases.
Note: The answer is correct. It is not valid to appoint the wife as imam for salah.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
