Bear with me because this may be long.
I lost my husband in an accident very suddenly and unexpectedly about 10 days before the 1st lockdown. Our second DD was born about a month before and we have a toddler DD too, so I had a lot to deal with and it's been a shitty year. We also have DN10 who lives with us and has done for 5 years.
DH and I were friends with a couple. I was friends with Linda at Uni and he was friends with Jack. When we met at University we introduced them to each other. DH and Jack had a bust up a year or so after we began dating over his treatment of me (lots of pervy comments and occasionally aggressive when drunk). He decided to drop him as a friend because of it, but 6 weeks later Jack showed up with Linda and they have been together ever since. I've always had a strange feeling around him, but Linda has been a fantastic friend and I feel sorry for her being married to him. DH and I moved to a small London suburb where I grew up about 7 years ago when we got married, 6 months later they moved to a few roads away as they liked the area so much and I introduced Linda to my friends etc etc.
I found out 2 years ago from Linda that Jack was having an affair with the much younger sister of one of my friends. I was supportive to Linda and she decided to work things out with him.
When DH died Linda was there everyday and it was great. But I started to feel smothered and I just wanted some time to absorb everything with my family and get used to the differences. I decided to take all 3 children to our holiday home in France for 6 weeks during the summer holidays and it was amazing. Just what we needed to be able to breathe again. My DPs and DPil came out to stay for a couple of weeks too. But Linda kept pushing to come and see us and stay for a couple of weeks with her children and Jack. Tbh it was worded like she was worried about me, but the incessant badgering just felt like she actually just wanted a free holiday. I said no (very firmly) after weeks of it and she sent me a long message about friendship and gratitude.
Here is the problem. I have barely heard from Jack since March. But last month I joined them with all the children to see an outdoor christmas lights attraction. Linda dropped out at the last minute as she had to work late. Jack made some really inappropriate comments during the outing (as usual) and asked when I would be looking for someone knew. At this I told him he was disgusting and left. He then sent me an explicit text a week later. I told him he was disgusting and (here is where I may have made the mistake) I sent a screenshot of the message and a summary of his behaviour to Linda.
Linda has decided that I want to steal her disgusting husband and sent me some vile messages. She has also told all of my friends that I'm on the look out for a new man and that they should keep an eye on their husbands. I've since had messages from 3 of my friends berating me and I've been removed from all my friendship whatsapp groups and blocked by at least 4 other friends. I'm so confused because he's made passes at a few of these women before and it's very well known that neither DH nor I liked him.
I've never felt so alone. What do I do?