My SIL was married, her H had an OW and subsequently left her. SHe was devastated, and moved in with her mum, then they bought a place together.
She has always been into DIY and as Dp is doing up his place, she's been coming down a weekends to help. Last summer she started bringing a 'handyman' with her - and as it's 1.5 hours away, they stayed over. The first few times Dp stayed in the same house (We don't live together, he has a 1 bed house and the men slept on his floor). After that, he slept at mine instead.
Round about christmas, I found out that she and this bloke were lovers. He has a partner of 25 years, and 2 teenage kids. His DW chucked him out (good for her!) and of course the gossip is all round the village. MIL is lovely, and was horrified. She was adamant that this bloke would not have easy access to her family, and would not allow him into her house. SIL then turned utter-bitch to her mum, calling her names, and saying some really spiteful, bitchy things. She also started to get a bit off with me, even before I knew about it all. Anyway, DP wanted to 'support his mum' and we agreed that this bloke would NOT be welcome into dps house again.
I went away in Feb for a 6 week trip, coming back once for a weekend. SIL was suggesting in every-increasing urgency that DP allow her and lover to come down (nowhere else to shag!. WE (DP and I) arranged all his weekends while I was away - 'that one is mother's day and you will be at home, that one is a work-do..' that sort of thing, to avoid her and him coming down.
When I came home, I found out that DP had let her and him come for a weekend, and deliberately not told me. I know he wanted the work done (anyone could have helped him, it wasn't skilled work) , but she'd told him not to tell me, as 'i wasn't there, didn't need to know'. He went along with it, thinking i'd never know. I am furious with him for the deliberate deceit, and with her for her complete rough-shod riding over everyone who gets in her way (her mother, her brother, his relationship with me, her lover's wife etc etc)
I left dp, and it took a week or so of texts and chat to get us back together, although I am still wary and angry at the deliberate deceit from him. I told dp that I would never be in the same room as SIL again. He agreed, whilst saying things like 'I love her, she is family' - he is a weak man and has a blind-spot for 'family' who can do no wrong.
SIL is now getting married to this bloke. DP is invited, I am too (grudgingly I imagine). I don't want to go, but DP is saying I should to 'support him'. I jsut think Fuck That Shit.
WWYD?