What to do ?

So my husband and I have been having some issues lately nothing big just everyday things like picking up clothes from the floor etc and I saw a text my husband received from his cousin (who  is also my sons godfather ) said to my husband fuck all the stress I know this spot where you get a Korean massage-full package if u know what I mean , u need to distress and trust me u will . Of course I got furious... of course I understand men are men but that's just not ok for someone to suggest to a married man maybe if he was single .  I feel it's disrespectful in many ways Bcus it shows he doesn't respect our marriage he's pushing infidelity and that would break our marriage, not only that but our family . It also shows me he doesn't respect me as a person, I used to think highly of him as he seems of good character and always respectful ,for that reason we chose him to be our sons godfather. him and his wife are who we go out with most of  the time ,we always double date and have play dates since their son is 1 and ours is 2 they love to play. I discussed it with my husband and he apologized and said he told him to not suggest those things to him but that was it . It's been like 3 weeks and I can't get over it I don't want to go out with them and they keep insisting . I can't see them the same I don't want to pretend to be cool when I don't respect him anymore I rather be sincere but don't want to cause family feud either . My question is - Is it ok for me to stop contact with them or should I try to work it out bcus I really don't want to . I will never see him the same and since I'm really close to his wife I want to tell her what happened just so she knows what kind of man he is and if it's ok for him to suggest it it might be ok for him to do it ?? Or maybe he's done it before ..  Thoughts and suggestions appreciated