@pleasehelp,
Hello pleasehelp. Nice to meet you.
Yes, you did wrong. You know that. How much wrong, only you know that.
Your wife knows her "wild" sister. They're sisters.
"feeling me, and I guess I felt her"..........................if this is all, then....
Give it time. Give her space. Because of the children, if your wife is rational, she'll take your sorry butt back.
Good luck.