Husband's Betrayal Leads to Divorce

So I (37F) and my husband (40M) are passionate about health and fitness, so we always insist

on taking our son for a walk before breakfast to activate the metabolism. However when we

got back this morning I find this blonde bimbo has let herself into our house ( with a key my husband

swears he didn't give her) Not only has this bitch helped herself to my son's food

but she's curled up in his room as if she lives here. Here's where I might be the arsehole,

I lost my temper and accused my husband of having an affair. He denied it and I will admit I ate

the girl before I could get her side of the story. But am I seriously supposed to believe

my husband when he claims that "he has never seen her before." ( Especially given