Was Feeling Unsteady on Saturday

I had a PM on saturday that made me feeling a little uneasy.. well the girl will soon be returning to work. and yes whilst what happened was mere flirting and a game on her part my other half took it to heart and his feelings messed with, ok and to an extent his age played a part too, and things have been good at him recently,, but I am now worried that her returning to work is going to upset the balance.. I know my other half tells me its me he loves and me he wants,, I am still worried that his feelings are going to be aroused when she returns to working with him,, I have never had a reason not to trust him before now, but something is eating at me and yes its hurting cause deep down.. But I have to try and brush it away, as I know they have to work together and they have to be friends and get on, but because my otherhalf picked the signals wrong I am so worried that somethings going to go tits up if I say too much about it,, so best if I keep quiet,, hope this girl tells him it was a laugh on her part.. and leave him alone appart from in the working sense,, no more winding him up