I could really do with some advice. I recently discovered my brother in law is having some sort of relationship with another woman behind my sisters back. They been together 25 yrs married 17 yrs and have 3 kids together. My sister was 15 when they got together and has never known anything different she's never worked as he didnt want her to so she's been a stay at home mum. She relies souly on the money he earns (has own business).
I don't know all the details of whats been going on only that foe the last few months they have been txting ALOT from the minute he gets up till he goes to bed.
If i tell her whether he's slept with this girl or not my sister will see it as cheating as do I.
Do I tell her and destroy her and the kids lives coz i dont know if she's strong enough to deal with this.She suffers with depression.
If it was me she'd tell me but im strong i can pick myself up and start again but If I dont and she finds out i knew she'd never forgive me.
Please Help