First of all, there is no Scriptural command or principle that would forbid a husband from having his wife undergo any cosmetic surgery including having breast implants.
With that said these are the Scriptural principles which should guide a husband’s decision as to whether or not his wife will get breast implants:
Principle # 1 – The wife is to submit to her husband in everything
Ephesians 5:24 teaches that wives are to submit to their husbands in “everything”, and “everything” would include whether or not they get any cosmetic surgery, including breast implants. In other words, the feminist mantra “my body, my choice” is completely unscriptural.
Principle #2 – A husband should hear his wife’s needs and concerns, but the decision is his.
1 Peter 3:7 commands men to live with their wives “according to knowledge”. That means a husband must know how his wife operates, how she thinks and he should know her needs as well as concerns. But a man listening to his wife and knowing her thoughts and concerns is not the same as him being bound to her wishes. He makes the decision, but he just needs to make sure such a decision is an informed decision.
Principle #3 – A husband should care for the needs of his wife’s body as he does his own
Ephesians 5:28 teaches that men are to show the same care and concern for the health of their wives’ bodies as they do their own. A husband’s decision to have his wife undergo any cosmetic surgery must take this principle into account.
Principle #4 – A wife’s breasts should satisfy her husband
Proverbs 5:19 teaches that a wife’s breasts, symbolic of her entire body, is to satisfy her husband. A wife should have breast work done which satisfies her husband’s desires. And his desire may or may not align with her desire. That means if he likes her breasts as they are, then she should leave them as they are. If she likes her breasts as they are, but he would like a change made, then she is to submit to him in this way as she should in everything.