Still vs but still

[thehammer]

Which one is correct?

1- I have grown up a lot but still I sometimes take a nap in my mom's lap.

2- I have grown up a lot. Still I sometimes take a nap in my mom's lap.

 

[5jj]

Which one is correct?

1- I have grown up a lot but still I sometimes take a nap in my mom's lap.

2- I have grown up a lot. Still I sometimes take a nap in my mom's lap.

Neither is very natural. I have grown up a lot but I still sometimes take a nap on my mom's lap works better. However, anyone capable of saying/writing that is unlikely to do it.