MIL possibly having affair

[MouseyHousey]

My SIL has told me that our MIL is possibly having an affair. There has been some slightly strange behaviour but not enough for anyone to be really suspicious.
However now SIL has said someone (she wont tell me who) saw MIL with someone at an odd time and place.
Now Im wondering if I should talk to DH about it. I dont want to cause trouble if its nothing but I hate keeping things from him! WWYD?

Both mine and my husband's parents have had numerous affairs. We leave them to it and say nothing to them, it's not our business (it was my business when I lived at home and my dad was blatantly having an affair but they are now divorced).

I might mention it to your husband though, but then we talk about our parents openly and honestly as a way of keeping sane!

I do think what goes on in people's marriages is their own business though, and would not dream of 'telling' as my feeling is they often know/want to block the idea.

SIL has put you in an awkward position hasn't she, . I can't keep things from my DH either, if you keep stumm and another family member tells him and he asks you if you knew, could you say it was none of your business and didn't want to upset him?

This is a rubbish situation...

I'd tell him exactly what you know, I think. That your SIL mentioned that his mum had been spotted xxx with xxx, and see how he responded. I wouldn't suggest, or mention, an affair, I'd let him develop his own theories. That way you've just passed on the message, so you aren't keeping things from him, but you haven't suggested anything or accused anyone.

Hopefully your DH will come to the same conclusion you have, and you'll be able to talk about it. If he wants to ignore it, or come up with a better solution, than at least he'll know if it comes out in the future.

I'd say nothing and would ask SIL not to tell me any more of this stuff and to discuss it with her brother if she wants to discuss her mother's life.

Thanks for all your comments. Just to clear up it is SILs MIL too, we are married to brothers.
She was telling me to see if I thought she should tell her DH. I told her I wasnt sure and it then left me wondering if I should tell mine.
I have told my Dh, he knows the man in quetion and he is a bit of a womaniser but said hes no idea if theres anything going on with him and his mum but he doesnt want to get involved. Im glad I told him. No way would I tell FIL, I want to stay out of it too just didnt want to keep my DH in the dark.

STFU. It is just not your business, nor your DH's.

That was a bit unnecessary tinkertitonk, I just said both me and DH dont want to be involved. Perhaps try reading the whole thread before posting such tosh.