Seeking Sister Wives ' Davis family has welcomed another woman into their polygamous relationship.

Nick Davis and wives April Davis and Jennifer Davis started dating longtime friend Teresa after amicably parting ways with former sister wife Danielle . In fact, according to the trio, it was Teresa's idea to be added into their unconventional dynamic.

"About six months after we broke up with Danielle, Teresa started coming to Jen and I and telling us how much she loves Nick," April shared in E! News' exclusive look at Sept. 29's episode of the TLC series , "and that she thinks she would be a good fit to be a sister wife."

While the family initially thought Teresa—who she said was "very supportive" in the aftermath of the split from Danielle—was joking, it turned out the HV

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