Is it permissible to refrain from consuming items brought by the husband through his female colleague at work, knowing that their price has been paid?

The wife must remind her husband of Allah Almighty and explain to him the impermissibility of this relationship and the necessity of ending it immediately.

If the wife's refusal to consume what the husband brings from that woman deters him from this relationship, then there is no blame upon her for that. However, if he takes it in exchange for that forbidden relationship, then neither he nor anyone aware of the situation is permitted to benefit from it except to the extent of the price he pays for it.