The email was signed "Worried Wife" and contained a blunt version of a question Bronwyn Lea has heard many times while working with women in and around churches.

The writer said her husband had become friends with another woman his own age. There were no signs of trouble, but they traded messages about all kinds of things. This was creating a "jealous-wife space" in her mind.

"Worried Wife" concluded: "I need a biblical perspective. What is a godly view of cross-gender friendships, and how should they be approached within the context of marriage?"

That's a crucial question these days for clergy and leaders of other ministries and fellowships, said Lea, author of "Beyond Awkward Side Hugs: Living as Christian Brothers and Sisters in a Sex-Crazed World." All of those #ChurchToo reports about sexual abuse and inappropriate relationships have people on edge -- with good cause.

Lea, who has a seminary degree and law-school credentials, is convinced that it's time for churches to act more like extended families and less like companies that sort people into niches defined by age, gender and marital status.

"Many people are lonely and they truly long for some kind of connection with others," she said. "But they've also heard so many horror stories about what can go wrong that they're afraid to reach out. They think that everyone will think that they're creepy or weird if they open up. … Lots of people are giving up and checking out."

Everyone knows the church is "supposed to be a family that everyone can belong to. … That's the vision that we need to reclaim," said Lea, a staff member at the First Baptist Church in Davis, Calif. Thus, the New Testament says: "Treat younger men as brothers, older women as mothers, and younger women as sisters, with absolute purity."

The problem is making that work at the personal level, where pastors, teachers, parents and laypeople are trying to find realistic ways to handle social media, complex career pressures, tensions in modern families and constantly-changing gender roles.