Two years ago my husband and his 2 brothers went back to their home country for a funeral. After 2 weeks my husband and his younger brother returned to England, whereas their older brother stayed due to immigration issues. During this time they began to hear through the grapevine that their older brother was due to get married. They both called and confronted him and he denied this. Following this they heard through family members that he did indeed marry a second wife and were sent some photos of him on the alleged wedding day. My husband informed his sister in law that her husband has apparently remarried. Throughout this the brother denied this and most of the family refused to get involved or speak to the UK wife, in the end one of their sisters called the UK wife and stated it was a misunderstanding of a friend's wedding. Time passed, the husband returned to the England and all returned to normal.
Then last year summer my husband's brother once again returned to his home country, stayed for a few months and again returned to England after immigration had been sorted. We have since heard his second wife has now had a baby. Most of the family are of the view that they are not getting involved. However, no-one will directly say to the UK wife that her husband is lying, nor give any actual evidence of this second marriage, so the UK wife feels she can't act from rumours.
Fast forward to this summer, me and my husband and our kids went with my mother in law to their home country. They all know I get on well with the first wife and so no one says anything directly to me. Although my mother in law showed me baby things that her oldest son had asked her through WhatsApp to bring, she didn't say who it's for or why. They obviously did not introduce me to this second wife. However my husband's grandma did have a rant at her daughter (my mother in law), my husband and his sister, about their brother remarrying and the fact there is now a child born with no one to take care of it. This was not done in English but with the use of names and certain words like marry and baby being the same I was able to work it out. My husband is of the view he doesn't want to be involved and it's his word against his brother. I'm however torn, I feel like I am also hiding the truth from my sister in law.
My husband feels we should just keep quiet, as perhaps my sister in law already knows. Her husband is not going to admit to the relationship anyway. My husband is of the view if we say anything we will just be painted as the relationship destroyers. They won't talk to me directly but his mother and their younger brother share this view and have stated this to my husband.
AIBU To tell my sister in law, potentially ruin their family for this affair and subsequent child which I have no real evidence for and noone willing to say anything about. Yet do so knowing I would want to be told in this situation.
AIBU To tell her
YANBU To not say anything