Translation:She is talking on the telephone while watching her son.
Je vous en prie ! :)
Mais j'ai peur que l'on ne peut pas le dire comme ça (I'm afraid you can't say it like that). ;) The most common way to say "Thank you [very/so] much!" is "Merci beaucoup !" Other favourite alternatives of mine include "Merci bien !", "Mille mercis !", and "Merci infiniment !" Plus many others, depending on the context.
Both are accepted now, but changes can take several days to show. Unfortunately there's nothing we can do about it but wait and be patient.
If you have "phone" rejected before 4 April, 2018, please just move on (maybe grumbling at the computer out loud, but don't post it in the comments or put it in a report!).
IF it is on or after 4 April, 2018, AND there is NO other error in your translation, please take a screenshot and post it here. To post a screenshot here, you'll have to upload it to a hosting site like Imgur. Then right click on the picture and click "Copy image address" (or the equivalent in your browser). Then, here, type
!(Pasted image address), replacing "Pasted image address" with what you just copied. Make sure not to leave any spaces.