well what mamma dont kno dont hurt her...how long have u been together? i sympathize with u and understand how u feel...but if she is really against it, theres always the chance she will have a change of heart from this new info...i mean express how it helps u and how u moderate this to not become an abusive situation other than that u cant really tell how shes gonna react, which is why i say if ur currently happy then what mamma dont kno wont hurt her, its not like ur cheating or nething...just my 2cents