Relationship

"wife ko pata na hona ya karna yahi ek rasta hain" else you may fall in adultery case.

unless you are professing Muslim religion, you cannot marry more than once while you are already married. That would amount to adultry which is a criminal offence.

Consult and get relief.

it is a adultery and it's offensive.if they both are agree for live together with you then no any laws have objection itself.