If a man is fully committed to his partner and they’re done with having children a vasectomy is the easiest solution and the honourable thing to do.
But he isn't sure that he's done with having children is he?
If his wife is do sure that she's done with having children then she needs to be sterilised. Why should she gave the right to demand it of op, meanwhile keeping her fertility intact so that if, in the future she decides to start over she'll be able to.
Of course she can refuse piv sex and op can refuse to live in a relationship like that. Maybe his wife wants to think about what her.life will look like post divorce when she only sees the children eow and is paying out child support.
Plus, wonder what she'll do contraception wise if they split up? Reckon she'll be celibate for the rest of her days, only what contraception would be available to her - no hormonal, no coil, no diaphragm , no condoms, no sterilisation - will she insist that any boyfriend has a vasectomy first? Wonder how she'd explain that on her tinder profile?
Her attitude has big all to do with contraception or fear of pregnancy and all to do with controlling op.