No, it is still considered a 'sin' for a baptized Jehovah's Witness to work for a church.
But it is not a 'sin' for the Watchtower Society to sell one of their kingdom halls to a church.
The 'sister' can technically say she is working fr the bridal party and it is just a coincidence that the photos needed to be taken inside the church and on the outside steps.
Her elders will look the other way.
Some elders here work on renovating churches all the time.
I have seen 5 or 6 of them at the same time painting a new nursery addition at a Baptist church.
I was at the church on 'secular' business with the pastor when I saw them.
They were very surprised when I showed up but I told them I wouldn't tell anyone at the hall.
They kept their mouths shut about it and so did I.
No need to get them in trouble for making a living.