I was 37 [my husband was 31] when I had my son Nicholas and we don't regret for a second having made the decision. 60 is the new 40 and if you are healthy, happy and financially sound to have another child then I can't see any reason not to.
My only caution would be, that depending on you doctor/obstetrician/midwife, certain tests may be recommended because of your age. Do your research so you can make an educated decision as to how you should proceed. My doctor made recommendations followed by the statement, "I'm required to mention them [ie: amniocentisis], but with this being your third pregnancy I don't see a need for them". These are tests beyond the usual ones performed during pregnancy like an ultrasound or urine test.
Nicholas was born on schedule weighing in at close to 10 lbs. I just turned 58 in November and my 'baby' is now 21. My age has never been an issue with him, my other kids or anyone else. Stay involved, stay fit, always be young at heart and open your home to their friends to keep them safe.
I hope this helps peanut 13