My wife visa expired in April. Can she come here...

The relevant General Directorate of Residency and Foreigners Affairs (GDRFA) allows residents a grace period of 30 days to stay in the UAE after their visas expire.
As per the UAE immigration's fines system, the penalty to stay on after the expiration of the grace period is:
AED 25 per day during the first 6 months (180 days)
AED 50 per day during the second 6 months (180 days)
AED 100 per day after passing a year and more.
Those sponsoring their families: spouse, children, parents and siblings (relatives of first and second degree) must present:
a copy of the husband's/wife’s employment contract or company contract for investors
a salary certificate from the employer stating the employee's monthly salary
a legalised marriage certificate
a registered tenancy contract
latest utility bill.