The accused Ramesh Garasia, a servant at private farm house suspected that his wife Parta Devi, aged around 25 years had an affair with a local man, SHO Mount Abu Sajjan Singh said.
Last evening, the couple had heated argument over the issue and Garasia hit his wife by a baton, killing her on the spot, the SHO said.
On getting information from other servants, police reached the spot and shifted the body to a hospital's mortuary.