<human>: This is breaking news. She went out with some friends tonight, and is still currently out. I peeked at her iMessage and found the following exchange with one of her Crossfit trainers:

Wife: Let's hang out tonight.
Dude: Word, how so?
W: At your place. Only if you're up for it though, no pressure.
D: There's a party going on at my house...
W: Should I be scared?
D: No, I just can't take ppl to my house when there's a party going on.
W: Really? I'll drink for a little if that helps with the guys. And I am a girl. Otherwise you can come up with another option.
D: I'm sure we'll figure it out.
W: I mean, it's up to you...

About a month ago she went out with Crossfit friends and wound up staying out until 6am without so much as a call or text. Has me wondering what has been going on and for how long. How do I bring this up when/if she comes home tonight? I may very well pass out before she gets home, I have work in the morning.

I'm really freaked out. We have a two year old son and we're buying our first house together in two weeks, but everything inside of me is screaming to put the brakes on everything. Am I nuts?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Wife is texting another guy and asking him to hang out, and I accidentally stumbled upon the message chain but have no idea how to bring it up.