Selling Sunset star Christine Quinn has revealed she is "so grateful" to be expecting her first baby.The 31-year-old confirmed on Wednesday that she is pregnant with her first child.MORE: Christine Quinn's housemate will shock youFans of the Netflix show saw Christine and husband Christian Richard tie the knot at the end of season three in an elaborate wedding ceremony, and the pair are now planning the next step. WATCH: Inside Christine Quinn's $1million wedding"We are so grateful to be