A big love making waves on reality TV just got bigger.

Despite being investigated by the state of Utah for felony bigamy, Kody Brown has married a fourth wife, a source tells TMZ.

And now TLC, the network behind 'Sister Wives,' the reality series about Brown and his polygamist household, has confirmed the marriage report, according to E! Online.

Robyn Sullivan, a single mom of three who's depicted on the series as a fiancee getting to know the family, reportedly tied the knot with Brown in May. Yesterday, the two were spotted by Radar shopping for jewelry and perfume at a mall, where "they were greeted like rock stars."

The network doesn't plan to air footage of the private ceremony, but in the season finale episode, viewers will get to see the wedding reception.

Brown, an avowed fundamentalist Mormon, was raising 13 children with three wives in one household at the time of the latest wedding.