Should I be a savage b**ch?

So long story short, my boyfriend had naked pictures of his ex on his phone from a couple of moths ago when we took a brief hiatus from our relationship. We had a discussion about it and I couldn’t be too mad because I had actually done the same thing at the time with my ex. We both agreed to move on from this and to be open and honest about what’s going on in our lives.

But that doesn’t end there....

I want to let her boyfriend know that she’s been sending nudes to my “bro” under a secret account on Instagram, and comment on one of his pictures. Yeah I know I shouldn’t because I wouldn’t deserve that happening to me, but at the same time this chick is a snake and I want to squash it completely.

SHOULD I LET HER BF KNOW?

P.s. my ex is single and I stopped communicating with him.

P.s.s. I’m not a spiteful person, but this has really got me by the horns.