So a little back story me and my current partner have been together coming up to 4 years now (if you don't include a 6-7month split up we had) during covid of 2020 we now have a child together when we broke up in 2020 for them 6-7months we cut contact but spoke occasionally anyway during the break up we both got on with our own lives I met another boy and dated him and my partner said he never met anyone else nor did he do anything sexual with anyone else so this whole time I've been made to believe he's been clean about everything and kept himself to his self well today I was at his mums house as she was having our child (her grandson) overnight and we got talking about the time we broke up for them 6-7 month and she let slip that he had brought another girl home and they went on a date to the cinemas which is absolutely fine we was broken up I don't expect him to sit around depressed that we broke up as I was doing my own thing anyway today I'm hurt about the fact that I've been lied to this whole time asif I have mug written across my head like I've been laughed at this whole time when me and my partner got back together I was straight up with him from the start and told him yes there was such a person I was dating and slept with blah blah blah but my point was why have I been lied to this whole time why couldn't he of been straight up with me from the start I'm not bothered about the other girl I'm bothered about the lie his mum when she was telling me told me I shouldn't be upset about it because it was ages ago and he only brought the girl round once and she was never seen again but I don't care how long ago it was I could of been 5 years to 5 weeks ago it's still gonna hurt me just as much I'm sorry I'm just rambling on but I feel stupid as how small his mum has made me feel I feel now asif I can't be upset about it but tbh I feel betrayed I don't see the need in lying because now your gonna make me question everything else I have brought it up with my partner tonight and asked him why has he lied to me this whole time and he's still denying it and calling his mum a liar