Welcome to the forums!
Yup, a very tight fold. If u r not familiar with Poker Strategy Equilab, download a free version to help in evaluating a spot like this. Here is an example.
http://www.pokerstrategy.com
Board: 4d3h2sKc
Equity Win Tie
MP2 45.13% 45.13% 0.00% { 33-22, A5s, 65s }
MP3 54.87% 54.87% 0.00% { 4s4c }
If u call the $50 the pot will become $153. So, u need 50/153 or 32.7% equity to call. The range above (MP2) shows u have 45.1%, even if she flopped straight. Please note that if she is loose (UTG), then another 12 combos (each) of A5/65 need to be added.
GL!