A Submissive Wife should remember that as she gets older sex becomes more brain focused than body focused, so you need to adapt the way you make love.  

Your body changes lubrication diminishes, your hormones change. 

Start getting in the mood hours before, pamper yourself first, don’t be afraid to use lubrication, try the flavoured ones, take your time stop worrying about if you will orgasm or not enjoy and the intimacy.