She’s cheating, right?

My wife is a stay at home trad wife. We have 3 kids. We’ve had some challenges in our marriage for the last 2 years. Lots of fighting, distance, and less sex. Most of that stems from just busy life with kids, but also a work change and faith transition I went through that caused a lot of disagreement. Anyway, today I’m at work, and I get a random text from her that says “Are you at the house?” She knows I’m not at the house because I’m always at the office during the day. I responded and said no, I was at the office. She responded and said, “I don’t even know how that was sent. Must have been Siri. I’m just cleaning the house.” I didn’t think much of it. Anyway, I call about 30 minutes later. No answer. I also text and ask about kids schedules. No response. She has an Apple Watch so she would see the text. I call again about 30 minutes later. No answer. In fact, no communication all afternoon. Our kids are all in school so she has the house to herself during the day. She usually goes to the gym, shops, and hangs out with other women in the neighborhood. I pick up kids and then come home and she is totally dolled up, makeup, pedicure, and cute outfit. Normally, she does not do that. I asked why she was all dolled up and she said that she got some new makeup and wanted to try it out. I asked why she didn’t answer all afternoon and she said she had a FaceTime call with our interior designer for a long time (we already finished home renovations last year but she says there are a last few things to do).

Am I crazy or is she having an affair? Could it just be a series of coincidences the same day? Something just felt super odd that all those things happened within the span of a few hours. Should I seek to confirm somehow? I straight up asked her if there was something going on and she of course said no. I asked again, and she said no and that she didn’t even like me suggesting something like that. Gaslighting or truth? Do I check her phone or email? Is that an invasion of her privacy? But I should probably know if she’s sleeping with someone else for my own health. What do I do here?