Your wife's sexual exploits are none of your business.
What she does in her personal life is none of your business.
What you do in your personal life is none of her business.
Letting her friends tell you this crap doesn't do a thing for you.
Become healthy in mind, body and spirit. Be happy that the kids get to spend more time with their mom.
It's tough. It's hard. It's a shitty thing to go through. Give yourself good boundaries. This process is tough enough without willingly walking through toxic sludge.
And with the lawyer... go for the fair settlement. No one wins in divorce. We lost all our savings, bonds and stocks because my former spouse became angry and went to an exorbitant lawyer ($650 an hour, his paralegal $350). And I was partly to blame because I didn't know how to let go, fear ruled me. Anger ruled him. Both negative emotions destroyed our financial security. Beware.