I'll try and keep this short but it's a bit crazy.
I love my in-laws. They have always been wonderful to me but a couple of months ago I notice my FIL started following some inappropriate people on TT and FB and stuff. I brought it up to my DH but not in a judgy way because in my past I've known a lot of males do this (not sexiest I promise just talking from my experience) anyway, I brought it up, more to say 'is everything okay at home'. I want them to be okay. DH kindve shrugged it off.
Anyway fast forward to last week. I got a phone call from MIL who said she needs to speak with me ASAP. So I went down to hers. FIL was out at the gym. She opened up about finding messages between him and 20 other women. Some on whatsapp, TikTok, accounts from another country who be pays to speak with and watch (if you know what I mean) so glorified porn basically. All incredibly young. Legal but young. Naturally, she was devastated. She told me she asked him about it. And he said 'it's just a bit of fun, I'm never going to actually meet these people' and laughed at her when she expressed how upsetting she found it and how she felt ugly and asked what she was doing wrong to cause him to look elsewhere. He had no answer, just laughed and left the house. When he returned she demanded he deleted all the apps and he was apprehensive but in the end he did so. He then asked her to get a bunch of new make up (which in itself made her feel like she's not pretty enough bless her)
Now today, I was called around again. Last night she found a second phone. All these apps and the women he was speaking to are on that phone. He is still speaking with them. She calmed herself down, went downstairs and said 'you're not lying to me anymore are you?' To which he said no and then followed it up with 'you promise on our families lives, on my life, that you're not lying about anything?' And again he said no. She then handed him the phone and asked what the fuck is all this then.
He left the house swiftly without a reply. He then come back, said he's bored as he's out of work at the moment and again, it's just a bit of fun, he's never going to physically meet these women. She asked if he wants to split up (after 36 years married) and he said no but won't give her a clear answer as to why he's doing this.
Anyway, MIL has now asked me to practically stalk him. To sign up to apps like telegram and TikTok and WhatsApp, all the apps he's said he's deleted and basically screenshot her whenever he goes online. I respect her and I understand but I feel like im in the wrong doing this. I want to support her in anyway I can but I don't know if this is helping or just fuelling a fire.
I've asked her what she wants. If she wants to be with him and her answer is, I have nowhere else to go. Everything is in his name. They have a holiday ti Spain together next week which they booked in lockdown. I honestly don't know what to say to her or how to help. Literally all advice is welcome! Has anyone been in her position? Or my position? What is the best way to handle all this