i know of a couple similar to that too.
theyre both in their 40s. he tells me their marriage of 20 odd years is very very happy, apart from there being no sex between them.
she lost her drive after starting a family, but he hasnt lost his, far from it, and would love things to be happening with them still, but shes just not interested.
he no longer persues anything for fear of rejection again, and he'd not dream of putting pressure on her to do something she didnt want to do.
they also no longer talk about it so as not to cause rows. and so to keep the peace, he keeps his frustrations to himself..
he tells me they love each other dearly, get on great, enjoy each others company still, and they are very happy.
hes a great husband, got an excellent job, beautiful home, is caring, thoughtful, does loads around the house to help - cooking, shopping, washing, ironing, diy, takes her on nice surprise trips away etc etc..
but dont you think resentment would set in at some point, if one partner feels they are being deprived of such intimacy - not just physically but emotionally ....?
its a tricky one isnt it ...