I got a late start in having children. My first was born when I was almost 37 and my youngest was born when I was 43. Now she's 7 and her older brother is 10 and they want me to play football with them in the park. Problem is, I'm 50 (51 in February) and have a bad back; sometimes I can hardly walk. Plus I have a very very hard job that requires a lot of travel and it takes a lot out of me. I just don't have the energy to entertain these children. I feel bad that I can't give these children what they want but my body won't allow it. Anyone else have a problem like this? Having children too late in life?