hi man, first of all congratulations...
well its very safe to travel in flight at this point of time, just few tips ,to b on safe side..
1.give some homemade food ,to eat in flight
2.ask at check-in counter to give her the front row or the overwing exit row..there is lot of leg space for her to sit comfortably
3.put a pillow on her stomach,before putting the seatbelt inside the flight..sometime the landing or turbulance may hurt her...and plzzzzz tell her to put her seat belt on , for the whole flight..
4.avoid drinking any softdrink,or tea and coffee
5.the best thing is to fly with qatar airways, coz u can check-in online for her, and one more thing ..ask for a seat which is away from the window...seeing outside of it may make her fell dizzy..
take care